Request for libfprint port for 2808:a658

imsick · November 4, 2024, 2:25pm

The fingerprint sensor on various Asus devices is 2808:a658, which I found mainly dues to its cheaper production cost.

But unfortunately there had been no drivers supporting the same for linux.

However recently the drivers surfaced on github, without source code (packaged .so.2 files in .deb and .rpm format.

There is also a corresponding AUR repo for the same. AUR (en) - libfprint-ft9366 extending the support for Arch users.

I would like to request if someone can port it for nix. I tried to build the library myself, however got stuck in a dependency hell. (I’m new to Nix ecosystem)
Can help to test it out.

Here are the curated resources which I gathered during my quest:

Atemu · November 4, 2024, 10:24pm

I’d recommend you to open a package request in Nixpkgs.

Though you’re unlikely to get anyone to do it unless they also have this sensor.

You should be able to patchelf the .so using autoPatchelfHook though, have you tried that?

waffle8946 · November 5, 2024, 3:03am

Also if you share what you tried, we can suggest changes here too.

imsick · November 5, 2024, 8:34am

Okay, thank you I wasn’t aware about “package request”. I’ll check that out!
Yes, I tried to use patchelf, by referring to other similar repo.
I’ll attach my attempt to do the same in next comment.

imsick · November 5, 2024, 8:39am

Thank you for your response. I tried various versions of my attempt. Sharing one of those.

{ stdenv, lib, fetchurl, dpkg, libfprint-tod, pkg-config, pkgs }:

stdenv.mkDerivation rec {
  pname = "libfprint-ft9366";
  version = "1.94.4";

  src = fetchurl {
    # main branch perma link
    url = "https://github.com/ftfpteams/RTS5811-FT9366-fingerprint-linux-driver-with-VID-2808-and-PID-a658/raw/b040ccd953c27e26c1285c456b4264e70b36bc3f/libfprint-2-2_1.94.4+tod1-0ubuntu1~22.04.2_amd64_rts5811.deb";
    hash = "sha256-vH1SbJ+/Uro7IQKM/SNUo44ySZqMwj+SgmmzOmwAgpw=";
  };

  nativeBuildInputs = [ dpkg pkg-config ];
  buildInputs = with pkgs; [
    libxml2
    (python3.withPackages (p: with p; [
      pygobject3 gst-python 
    ]))
  ];

  unpackPhase = ''
    dpkg-deb -x $src .
  '';

  buildPhase = ''
    patchelf \
      --set-rpath ${lib.makeLibraryPath [ libfprint-tod ]} \
      usr/lib/x86_64-linux-gnu/libfprint-2.so.2
  '';

  installPhase = ''
    mkdir -p "$out/lib"
    cp usr/lib/x86_64-linux-gnu/libfprint-2.so.2 "$out/lib/"
    ln -s "$out/lib/libfprint-2.so.2" "$out/lib/libfprint-2.so"

    # create pkgconfig file
    mkdir -p "$out/lib/pkgconfig"
    cat > "$out/lib/pkgconfig/libfprint-2.pc" << EOF
    prefix=$out
    exec_prefix=\''${prefix}
    libdir=\''${prefix}/lib
    includedir=\''${prefix}/include

    Name: libfprint-2
    Description: Generic Library for Fingerprint reader devices
    Version: ${version}
    Libs: -L\''${libdir} -lfprint-2
    Cflags: -I\''${includedir}/libfprint-2
    EOF

    # this header should be there, try to copy if they are really there
    if [ -d usr/include/libfprint-2 ]; then
      mkdir -p "$out/include"
      cp -r usr/include/libfprint-2 "$out/include/"
    fi
  '';

  meta = with lib; {
    description = "Proprietary driver for the Focaltech fingerprint reader 2808:a658";
    homepage = "https://github.com/ftfpteams/RTS5811-FT9366-fingerprint-linux-driver-with-VID-2808-and-PID-a658";
    license = licenses.unfree;
    platforms = [ "x86_64-linux" ];
    sourceProvenance = with sourceTypes; [ binaryNativeCode ];
  };
}

The build log looks fine upto this point

Program xmllint found: NO
Program python3 found: YES (/nix/store/h723hb9m43lybmvfxkk6n7j4v664qy7b-python3-3.11.9/bin/python3)
WARNING: You should add the boolean check kwarg to the run_command call.
         It currently defaults to false,
         but it will default to true in future releases of meson.
         See also: https://github.com/mesonbuild/meson/issues/9300

meson.build:156:8: ERROR: Problem encountered: Python3 module 'gi.repository.FPrint' required by test suite not found

Full Logs:

@nix { "action": "setPhase", "phase": "unpackPhase" }
Running phase: unpackPhase
unpacking source archive /nix/store/xg9nw7ic88c7dnbwfx2avd38yjc7fcf7-source
source root is source
@nix { "action": "setPhase", "phase": "patchPhase" }
Running phase: patchPhase
applying patch /nix/store/hszpvhcafv7wx31z160vjw6k8h3w3pq9-ae04fa989720279e5558c3b8ff9ebe1959b1cf36.patch
patching file tests/pam/test_pam_fprintd.py
patching file tests/test_fprintd_utils.py
patching script interpreter paths in po/check-translations.sh tests/unittest_inspector.py
po/check-translations.sh: interpreter directive changed from "#!/bin/bash" to "/nix/store/516kai7nl5dxr792c0nzq0jp8m4zvxpi-bash-5.2p32/bin/bash"
tests/unittest_inspector.py: interpreter directive changed from "#! /usr/bin/env python3" to "/nix/store/h723hb9m43lybmvfxkk6n7j4v664qy7b-python3-3.11.9/bin/python3"
substituteStream() in derivation fprintd-1.94.2: WARNING: '--replace' is deprecated, use --replace-{fail,warn,quiet}. (file 'tests/fprintd.py')
@nix { "action": "setPhase", "phase": "updateAutotoolsGnuConfigScriptsPhase" }
Running phase: updateAutotoolsGnuConfigScriptsPhase
@nix { "action": "setPhase", "phase": "configurePhase" }
Running phase: configurePhase
mesonConfigurePhase flags: --prefix=/nix/store/hzlmj6snb0kdqzpxz26rim0kw64m06cs-fprintd-1.94.2 --libdir=/nix/store/hzlmj6snb0kdqzpxz26rim0kw64m06cs-fprintd-1.94.2/lib --libexecdir=/nix/store/hzlmj6snb0kdqzpxz26ri>
The Meson build system
Version: 1.4.2
Source dir: /build/source
Build dir: /build/source/build
Build type: native build
Project name: fprintd
Project version: 1.94.2
C compiler for the host machine: gcc (gcc 13.2.0 "gcc (GCC) 13.2.0")
C linker for the host machine: gcc ld.bfd 2.41
Host machine cpu family: x86_64
Host machine cpu: x86_64
Compiler for C supports arguments -fno-strict-aliasing: YES
Compiler for C supports arguments -Wcast-align: YES
Compiler for C supports arguments -Werror=address: YES
Compiler for C supports arguments -Werror=array-bounds: YES
Compiler for C supports arguments -Werror=empty-body: YES
Compiler for C supports arguments -Werror=implicit: YES
Compiler for C supports arguments -Werror=init-self: YES
Compiler for C supports arguments -Werror=int-to-pointer-cast: YES
Compiler for C supports arguments -Werror=main: YES
Compiler for C supports arguments -Werror=missing-braces: YES
Compiler for C supports arguments -Werror=nonnull: YES
Compiler for C supports arguments -Werror=pointer-to-int-cast: YES
Compiler for C supports arguments -Werror=redundant-decls: YES
Compiler for C supports arguments -Werror=return-type: YES
Compiler for C supports arguments -Werror=sequence-point: YES
Compiler for C supports arguments -Werror=trigraphs: YES
Compiler for C supports arguments -Werror=write-strings: YES
Compiler for C supports arguments -Wformat-nonliteral: YES
Compiler for C supports arguments -Wformat-security: YES
Compiler for C supports arguments -Wformat=2: YES
Compiler for C supports arguments -Wignored-qualifiers: YES
Compiler for C supports arguments -Wimplicit-function-declaration: YES
Compiler for C supports arguments -Wlogical-op: YES
Compiler for C supports arguments -Wmissing-declarations: YES
Compiler for C supports arguments -Wmissing-format-attribute: YES
Compiler for C supports arguments -Wmissing-include-dirs: YES
Compiler for C supports arguments -Wmissing-noreturn: YES
Compiler for C supports arguments -Wmissing-prototypes: YES
Compiler for C supports arguments -Wnested-externs: YES
Compiler for C supports arguments -Wold-style-definition: YES
Compiler for C supports arguments -Wpointer-arith: YES
Compiler for C supports arguments -Wshadow: YES
Compiler for C supports arguments -Wstrict-prototypes: YES
Compiler for C supports arguments -Wtype-limits: YES
Compiler for C supports arguments -Wundef: YES
Compiler for C supports arguments -Wunused: YES
Compiler for C supports arguments -Wno-unused-parameter: YES
Compiler for C supports arguments -Wno-pedantic: YES
Compiler for C supports arguments -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_56: YES
Compiler for C supports arguments -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_56: YES
Found pkg-config: YES (/nix/store/4lssw6pk59r654j0yrfydv0kngk8zrqp-pkg-config-wrapper-0.29.2/bin/pkg-config) 0.29.2
Run-time dependency glib-2.0 found: YES 2.80.2
Run-time dependency gio-2.0 found: YES 2.80.2
Run-time dependency gio-unix-2.0 found: YES 2.80.2
Run-time dependency gmodule-2.0 found: YES 2.80.2
Run-time dependency libfprint-2 found: YES 1.94.4
Run-time dependency polkit-gobject-1 found: YES 124
Run-time dependency dbus-1 found: YES 1.14.10
Run-time dependency libsystemd found: YES 255
Has header "security/pam_modules.h" : YES
Library pam found: YES
Program pod2man found: YES (/nix/store/5ydyzdwlar4ssmhfjg154dy2s2bbyhj3-perl-5.38.2/bin/pod2man)
Program xsltproc found: YES (/nix/store/jb02zq14sa5fn52xcb82fhpwpnrv59rh-libxslt-1.1.39-bin/bin/xsltproc)
Run-time dependency systemd found: YES 255
Run-time dependency pam_wrapper found: YES 1.1.3
Program xmllint found: NO
Program python3 found: YES (/nix/store/h723hb9m43lybmvfxkk6n7j4v664qy7b-python3-3.11.9/bin/python3)
WARNING: You should add the boolean check kwarg to the run_command call.
         It currently defaults to false,
         but it will default to true in future releases of meson.
         See also: https://github.com/mesonbuild/meson/issues/9300

meson.build:156:8: ERROR: Problem encountered: Python3 module 'gi.repository.FPrint' required by test suite not found

A full log can be found at /build/source/build/meson-logs/meson-log.txt

Atemu · November 5, 2024, 9:30am

This is the error log of some other derivation, you never got to building the derivation you wrote.

Please just use autoPatchelfHook and provide the libraries that the library needs in buildInputs.

imsick · November 5, 2024, 1:03pm

Even if I do “nothing” in the build script, I end up with either python3 error (shown above) AND/OR libfprint-2 missing error.
Similar issues were noticed in yet another libfprint patch: https://discourse.nixos.org/t/i-am-trying-to-create-a-custom-package-containing-libfprint-drivers-firmware/

With the most minimal config, I get the following errors (missing libraries)

{ stdenv
, lib
, fetchurl
, dpkg
, autoPatchelfHook
}:

stdenv.mkDerivation rec {
  pname = "libfprint-ft9366";
  version = "1.94.4";

  src = fetchurl {
    url = "https://github.com/ftfpteams/RTS5811-FT9366-fingerprint-linux-driver-with-VID-2808-and-PID-a658/raw/b040ccd953c27e26c1285c456b4264e70b36bc3f/libfprint-2-2_1.94.4+tod1-0ubuntu1~22.04.2_amd64_rts5811.deb";
    hash = "sha256-vH1SbJ+/Uro7IQKM/SNUo44ySZqMwj+SgmmzOmwAgpw=";
  };

  nativeBuildInputs = [
    autoPatchelfHook
    dpkg
  ];

  unpackPhase = ''
    dpkg-deb -x $src .
  '';

  installPhase = ''
    cp -r . $out/
  '';
}

    libgio-2.0.so.0 -> not found!
    libgobject-2.0.so.0 -> not found!
    libglib-2.0.so.0 -> not found!
    libgusb.so.2 -> not found!
    libpixman-1.so.0 -> not found!
    libnss3.so -> not found!
    libgudev-1.0.so.0 -> not found!
    libstdc++.so.6 -> not found!
    libgcc_s.so.1 -> not found!
auto-patchelf: 9 dependencies could not be satisfied

Now trying to patch each library arrives me to:

    libgio-2.0.so.0 -> not found!       => glib
    libgobject-2.0.so.0 -> not found!   => glib
    libglib-2.0.so.0 -> not found!      => glib
    libgusb.so.2 -> not found!          => glib
    libpixman-1.so.0 -> not found!      => pixman
    libnss3.so -> not found!            => nss
    libgudev-1.0.so.0 -> not found!     => libgudev
    libstdc++.so.6 -> not found!        => stdenv.cc.cc
    libgcc_s.so.1 -> not found!         => stdenv.cc.cc
auto-patchelf: 9 dependencies could not be satisfied

{ stdenv, lib, fetchurl, dpkg, autoPatchelfHook, glib, gusb, pixman, libgudev, nss}:

stdenv.mkDerivation rec {
  pname = "libfprint-ft9366";
  version = "1.94.4";

  src = fetchurl {
    url = "https://github.com/ftfpteams/RTS5811-FT9366-fingerprint-linux-driver-with-VID-2808-and-PID-a658/raw/b040ccd953c27e26c1285c456b4264e70b36bc3f/libfprint-2-2_1.94.4+tod1-0ubuntu1~22.04.2_amd64_rts5811.deb";
    hash = "sha256-vH1SbJ+/Uro7IQKM/SNUo44ySZqMwj+SgmmzOmwAgpw=";
  };

  nativeBuildInputs = [
    autoPatchelfHook
    dpkg
  ];

  buildInputs = [
    stdenv.cc.cc
    glib
    gusb
    pixman
    nss
    libgudev
  ];

  unpackPhase = ''
    dpkg-deb -x $src .
  '';

  installPhase = ''
    cp -r . $out/
  '';
}

All required libraries were supplied, but this time Meson build fails.

Found pkg-config: YES (/nix/store/4lssw6pk59r654j0yrfydv0kngk8zrqp-pkg-config-wrapper-0.29.2/bin/pkg-config) 0.29.2
Run-time dependency glib-2.0 found: YES 2.80.2
Run-time dependency gio-2.0 found: YES 2.80.2
Run-time dependency gio-unix-2.0 found: YES 2.80.2
Run-time dependency gmodule-2.0 found: YES 2.80.2
Did not find CMake 'cmake'
Found CMake: NO
Run-time dependency libfprint-2 found: NO (tried pkgconfig)

meson.build:92:16: ERROR: Dependency "libfprint-2" not found, tried pkgconfig

A full log can be found at /build/source/build/meson-logs/meson-log.txt

Even adding libfprint doesn’t help (nix-locate libfprint-2)

Another thread which is relevant to this: [TRACKING] Fingerprint scanner compatibility with linux (ubuntu, fedora, etc) - #58 by NullVoxPopuli - Linux - Framework Community

Sorry for the trouble! I’m new to nix, and this is sort of overwhelming for me.

Atemu · November 5, 2024, 3:30pm

That derivation is looking better. Does it build now that you’ve added the buildInputs?

As mentioned previously, that other failure you’re seeing is not your derivation but a different one. Your derivation does not invoke meson in any way; it’s not an input.

You’ll have to figure out which derivation that is and what pulls it in.

imsick · November 5, 2024, 3:57pm

No, unfortunately this fails to build (attached the error message in last reply)
I don’t really understand from where it is calling the meson build script. And I cannot really make a lot of sense out of it anyway with my current knowledge about Nix and Derivations.

Thanks you all your help though!

I have opened a Package Request for the same on github. Hopefully it gets addressed some day!

github.com/NixOS/nixpkgs

Package request: libfprint supporting 2808:a658 from libfprint-2-2_1.94.4+tod1-0ubuntu1~22.04.2_amd64_rts5811.deb

opened 03:28PM - 05 Nov 24 UTC

dvishal485

0.kind: packaging request

**libfprint supporting 2808:a658** The fingerprint sensor on various Asus d…evices is 2808:a658 doesn't have existing drivers for NixOS, but exists for Ubuntu and Fedora based OS. The drivers are also accessible to Arch users via AUR PKGBUILD. `ID 2808:a658 Realtek USB2.0 Finger Print Bridge FocalTech Fingerprint Device` Package to patch: - [.deb format](https://github.com/ftfpteams/RTS5811-FT9366-fingerprint-linux-driver-with-VID-2808-and-PID-a658/blob/main/libfprint-2-2_1.94.4%2Btod1-0ubuntu1~22.04.2_amd64_rts5811.deb) - [.rpm format](https://github.com/ftfpteams/RTS5811-FT9366-fingerprint-linux-driver-with-VID-2808-and-PID-a658/blob/main/libfprint-2-2-1.94.4%2Btod1-FT9366_20240627.x86_64.rpm) - [AUR Package](https://aur.archlinux.org/packages/libfprint-ft9366) Corresponding discourse link: https://discourse.nixos.org/t/request-for-libfprint-port-for-2808-a658/ Corresponding AUR PKGBUILD ```bash # Maintainer: Harry Walker <me@harrywalker.uk> pkgname=libfprint-ft9366 pkgver=1.94.4 pkgrel=2 pkgdesc="Proprietary driver for the Focaltech fingerprint reader 2808:a658, which is used on various ASUS Vivobooks" arch=('x86_64') url="https://github.com/ftfpteams/RTS5811-FT9366-fingerprint-linux-driver-with-VID-2808-and-PID-a658" depends=('glib2>=2.56' 'libgusb>=0.3.0' 'nss>=3.13.4' 'pixman>=0.30.0') conflicts=('libfprint') provides=('libfprint-2.so' 'libfprint') options=('!strip' '!emptydirs') install=${pkgname}.install source=("https://github.com/ftfpteams/RTS5811-FT9366-fingerprint-linux-driver-with-VID-2808-and-PID-a658/raw/refs/heads/main/libfprint-2-2_1.94.4+tod1-0ubuntu1~22.04.2_amd64_rts5811.deb" "https://github.com/ftfpteams/RTS5811-FT9366-fingerprint-linux-driver-with-VID-2808-and-PID-a658/raw/refs/heads/main/libfprint-2-2-1.94.4+tod1-FT9366_20240627.x86_64.rpm") sha512sums=('9d8a98884ffe02c4871cac668e46038727a70fe0c0f4fbc9477a785612e6f0f567173eebaea83f78e9248a0a59a5ac5fef192546da997a6b43d6e1ba4dc90afb' '6e5bd54929c8dbcba6ce16628502ac34164c8aa72785f9d84d871c7a0c2baed2a54e957d4b46c7b5176ebe5354d3f8abebe9b8195e8115f621f47bcb5b86f894') package(){ # Extract package data tar -xI unzstd -f data.tar.zst -C "${pkgdir}" mkdir -p "${pkgdir}/usr/lib" cp usr/lib64/* "${pkgdir}/usr/lib" # Fix directory structure differences cd "${pkgdir}" install -D -m644 "usr/share/doc/libfprint-2-2/copyright" "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE" mv lib/* usr/lib; rm -rf lib mv usr/lib/x86_64-linux-gnu/libfprint-2.so.2 usr/lib rm -rf usr/lib/x86_64-linux-gnu getent group plugdev > /dev/null || groupadd plugdev cd .. } ``` **Metadata** * homepage URL: https://github.com/ftfpteams/RTS5811-FT9366-fingerprint-linux-driver-with-VID-2808-and-PID-a658/ * source URL: https://github.com/ftfpteams/RTS5811-FT9366-fingerprint-linux-driver-with-VID-2808-and-PID-a658/tree/main * license: unfree * platforms: linux --- Add a :+1: [reaction] to [issues you find important]. [reaction]: https://github.blog/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/ [issues you find important]: https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+sort%3Areactions-%2B1-desc

Aleksanaa · November 5, 2024, 4:03pm

Also the distributor seems quite… unreasonable. Who are you? Where did this come from?

And I guess it might actually come from the driver download page of a notebook vendor that advertises support for Linux.

imsick · November 5, 2024, 4:16pm

That’s understandable. Here is the thread around this discussion in the libfprint source code repository. The driver is being provided via focaltech-electonics email, who created the repository for accessibility https://gitlab.freedesktop.org/libfprint/libfprint/-/merge_requests/413#note_2476573

Also, unfortunately the person who shared this denied the request to open-source driver, quoting their comment.

RTS5811+FT9366 is a MOH solution, the source code contains our fingerprint algorithm, so we can’t open the source code.

And no, I couldn’t find the driver on notebook’s vendor page (for linux).

Atemu · November 5, 2024, 4:29pm

As mentioned, that build error does not happen in the derivation which you have shown us.

If there is no other error (please post the full build logs!) your derivation is likely to be working just fine.

Could you post the part where you actually integrate your drv into the system?

imsick · November 5, 2024, 4:41pm

(post deleted by author)

imsick · November 5, 2024, 4:53pm

Here is the snippet from my configuration.nix, the fp.nix is what I shared above.

{
  nixpkgs.overlays = [
    (self: super: {
      libfprint-ft9366 = super.callPackage ./fp.nix {};
    })
  ];

  services.fprintd = {
    enable = true;
    # Replace the default libfprint package with our custom one
    package = pkgs.fprintd.override { libfprint = pkgs.libfprint-ft9366; };
  };
  services.udev.packages = [ pkgs.libfprint-ft9366 ];
}

Here is the output which I get when I run nixos-rebuild switch.

error: builder for '/nix/store/av8bbif6gm7v6ivp23ciwkiwn8k44ib2-fprintd-1.94.2.drv' failed with exit code 1;
       last 10 log lines:
       > Run-time dependency gio-2.0 found: YES 2.80.2
       > Run-time dependency gio-unix-2.0 found: YES 2.80.2
       > Run-time dependency gmodule-2.0 found: YES 2.80.2
       > Did not find CMake 'cmake'
       > Found CMake: NO
       > Run-time dependency libfprint-2 found: NO (tried pkgconfig)
       >
       > meson.build:92:16: ERROR: Dependency "libfprint-2" not found, tried pkgconfig
       >
       > A full log can be found at /build/source/build/meson-logs/meson-log.txt
       For full logs, run 'nix log /nix/store/av8bbif6gm7v6ivp23ciwkiwn8k44ib2-fprintd-1.94.2.drv'.
error: 1 dependencies of derivation '/nix/store/yjq4cj52f0biwfiw3is4sdh71528qlwr-chfn.pam.drv' failed to build
error: 1 dependencies of derivation '/nix/store/hj0x48k50dd5n7038zyizazxfv40w21g-dbus-1.drv' failed to build
error: 1 dependencies of derivation '/nix/store/hrwfvdlsf559jmlj1r0cbw6x4z8ma7n9-dbus-1.drv' failed to build
error: 1 dependencies of derivation '/nix/store/vxhdg39jc4dfl4rkzhx0znchk1ppzym0-dbus-1.drv' failed to build
error: 1 dependencies of derivation '/nix/store/7fvhpazz55wnzp5pgic30fb3gb152rki-system-path.drv' failed to build
error: 1 dependencies of derivation '/nix/store/c10xghvk335mkq1s567z7glsc3dxpyig-system-path.drv' failed to build
error: 1 dependencies of derivation '/nix/store/hcrh4j2g5fyji51yad5hzlam6chn3ly9-system-path.drv' failed to build
error: 1 dependencies of derivation '/nix/store/vxw8s5dphxrr1ckl2zh6ir5rnizhy3g4-nixos-system-seattle-24.05.20241020.8917291.drv' failed to build

I’ve shared the output of nix log /nix/store/av8bbif6gm7v6ivp23ciwkiwn8k44ib2-fprintd-1.94.2.drv previously. (which mentioned that build failed because of missing dependency “libfprint-2”.

Atemu · November 5, 2024, 4:59pm

Hm that appears to be correct but it isn’t able to find the package’s libfprint via pkg-config. Could you show a tree of the regular libfprint derivation and yours? Check for differences (e.g. also using diffoscope), particularly regarding pkg-config.

imsick · November 5, 2024, 7:17pm

Could you show a tree of the regular libfprint derivation and yours?

I’m not really sure how to do that, but here’s what I did which might be useful. I used the most “hackiest” way I could think of.

Add the package in configuration.nix as follows: (removed fprintd and its package override statement)
```
{  environment.systemPackages = with pkgs; [ libfprint-ft9366 ]; }
```

Add tree command in the install phase of my fp.nix

  installPhase = ''
    cp -r . $out/
    tree $out
  '';

Build nixos and find my derivation in /nix/store and open up the corresponding log file with tree output within it. (builds with no errors)

❯ ls /nix/store/ | rg libfprint
7ps1r6pn609iard5pdsh3lvglz5rgbv6-libfprint-ft9366-1.94.4.drv
a7i246vzavn4x9mn0mng5d17rddrmpns-libfprint-ft9366-1.94.4
k8hm4dlzg1sz5yps6jm1dga6hgz3x9g9-libfprint-2-2_1.94.4+tod1-0ubuntu1-22.04.2_amd64_rts5811.deb
kial3br9li3a1wa5ski2ic89944rd0by-libfprint-2-2_1.94.4+tod1-0ubuntu1-22.04.2_amd64_rts5811.deb.drv
z3frbwnac944fk7605rv9l7kqr2c9vzf-libfprint-2-2_1.94.4+tod1-0ubuntu1-22.04.2_amd64_rts5811.deb.drv
 
❯ nix log /nix/store/7ps1r6pn609iard5pdsh3lvglz5rgbv6-libfprint-ft9366-1.94.4.drv
warning: The interpretation of store paths arguments ending in `.drv` recently changed. If this command is now failing try again with '/nix/store/7ps1r6pn609iard5pdsh3lvglz5rgbv6-libfprint-ft
9366-1.94.4.drv^*'
@nix { "action": "setPhase", "phase": "unpackPhase" }
Running phase: unpackPhase
@nix { "action": "setPhase", "phase": "patchPhase" }
Running phase: patchPhase
@nix { "action": "setPhase", "phase": "updateAutotoolsGnuConfigScriptsPhase" }
Running phase: updateAutotoolsGnuConfigScriptsPhase
@nix { "action": "setPhase", "phase": "configurePhase" }
Running phase: configurePhase
no configure script, doing nothing
@nix { "action": "setPhase", "phase": "buildPhase" }
Running phase: buildPhase
no Makefile or custom buildPhase, doing nothing
@nix { "action": "setPhase", "phase": "glibPreInstallPhase" }
Running phase: glibPreInstallPhase
@nix { "action": "setPhase", "phase": "installPhase" }
Running phase: installPhase
/nix/store/a7i246vzavn4x9mn0mng5d17rddrmpns-libfprint-ft9366-1.94.4
|-- env-vars
|-- lib
|   `-- udev
|       `-- rules.d
|           `-- 60-libfprint-2.rules
`-- usr
    |-- lib
    |   `-- x86_64-linux-gnu
    |       |-- libfprint-2.so.2 -> libfprint-2.so.2.0.0
    |       `-- libfprint-2.so.2.0.0
    `-- share
        |-- doc
        |   `-- libfprint-2-2
        |       |-- NEWS.gz
        |       |-- README
        |       |-- TODO
        |       |-- changelog.Debian.gz
        |       `-- copyright
        `-- lintian
            `-- overrides
                `-- libfprint-2-2

12 directories, 10 files
@nix { "action": "setPhase", "phase": "glibPreFixupPhase" }
Running phase: glibPreFixupPhase
@nix { "action": "setPhase", "phase": "fixupPhase" }
Running phase: fixupPhase
shrinking RPATHs of ELF executables and libraries in /nix/store/a7i246vzavn4x9mn0mng5d17rddrmpns-libfprint-ft9366-1.94.4
shrinking /nix/store/a7i246vzavn4x9mn0mng5d17rddrmpns-libfprint-ft9366-1.94.4/usr/lib/x86_64-linux-gnu/libfprint-2.so.2.0.0
checking for references to /build/ in /nix/store/a7i246vzavn4x9mn0mng5d17rddrmpns-libfprint-ft9366-1.94.4...
patching script interpreter paths in /nix/store/a7i246vzavn4x9mn0mng5d17rddrmpns-libfprint-ft9366-1.94.4
stripping (with command strip and flags -S -p) in  /nix/store/a7i246vzavn4x9mn0mng5d17rddrmpns-libfprint-ft9366-1.94.4/lib
automatically fixing dependencies for ELF files
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          PosixPath('/nix/store/v3r04cncyz4n2m6skybz94506xyxpgmz-gusb-0.4.9/lib'),
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          PosixPath('/nix/store/lcgjdhywpvpd0anzkvghz6hzf7ci8fp9-libgudev-238-dev/lib'),
          PosixPath('/nix/store/i5zmwqmbwwmpgq21nxjl6rn4mr0yva9a-libgudev-238/lib')],
 'paths': [PosixPath('/nix/store/a7i246vzavn4x9mn0mng5d17rddrmpns-libfprint-ft9366-1.94.4')],
 'recursive': True,
 'runtime_dependencies': []}
searching for dependencies of /nix/store/a7i246vzavn4x9mn0mng5d17rddrmpns-libfprint-ft9366-1.94.4/usr/lib/x86_64-linux-gnu/libfprint-2.so.2.0.0
    libgio-2.0.so.0 -> found: /nix/store/sr6skahp2mvi6y8d4g89a9vwk4yh4z0p-glib-2.80.2/lib
    libgobject-2.0.so.0 -> found: /nix/store/sr6skahp2mvi6y8d4g89a9vwk4yh4z0p-glib-2.80.2/lib
    libglib-2.0.so.0 -> found: /nix/store/sr6skahp2mvi6y8d4g89a9vwk4yh4z0p-glib-2.80.2/lib
    libgusb.so.2 -> found: /nix/store/v3r04cncyz4n2m6skybz94506xyxpgmz-gusb-0.4.9/lib
    libpixman-1.so.0 -> found: /nix/store/idqvgrnmvxrrr4mix4djcp3y54pzma9n-pixman-0.43.4/lib
    libnss3.so -> found: /nix/store/z9xjph974cjy97cqkv4kflyfz7x49575-nss-3.101.2/lib
    libgudev-1.0.so.0 -> found: /nix/store/i5zmwqmbwwmpgq21nxjl6rn4mr0yva9a-libgudev-238/lib
    libstdc++.so.6 -> found: /nix/store/swcl0ynnia5c57i6qfdcrqa72j7877mg-gcc-13.2.0-lib/lib
    libgcc_s.so.1 -> found: /nix/store/yfd49ay99aa1a0jg80jsvnxbyl61fsh6-gcc-13.2.0-libgcc/lib
setting RPATH to: /nix/store/sr6skahp2mvi6y8d4g89a9vwk4yh4z0p-glib-2.80.2/lib:/nix/store/v3r04cncyz4n2m6skybz94506xyxpgmz-gusb-0.4.9/lib:/nix/store/idqvgrnmvxrrr4mix4djcp3y54pzma9n-pixman-0.>
auto-patchelf: 0 dependencies could not be satisfied

Now I removed this package and added libfprint and then navigated to its directory in /nix/store/ and ran tree command

❯ cd /nix/store/48b5w5isr70y14vx38nmbpjfz8ww3i5c-libfprint-1.94.6/ 

/nix/store/48b5w5isr70y14vx38nmbpjfz8ww3i5c-libfprint-1.94.6🔒 
❯ tree
.
├── include
│   └── libfprint-2
│       ├── fp-context.h
│       ├── fp-device.h
│       ├── fp-enums.h
│       ├── fp-image-device.h
│       ├── fp-image.h
│       ├── fp-print.h
│       └── fprint.h
├── lib
│   ├── girepository-1.0
│   │   └── FPrint-2.0.typelib
│   ├── libfprint-2.so -> libfprint-2.so.2
│   ├── libfprint-2.so.2 -> libfprint-2.so.2.0.0
│   ├── libfprint-2.so.2.0.0
│   ├── pkgconfig
│   │   └── libfprint-2.pc
│   └── udev
│       ├── hwdb.d
│       │   └── 60-autosuspend-libfprint-2.hwdb
│       └── rules.d
│           └── 70-libfprint-2.rules
├── libexec
│   └── installed-tests
│       └── libfprint-2
│           ├── capture.py
│           ├── test-fp-context
│           ├── test-fp-device
│           ├── test-fpi-assembling
│           ├── test-fpi-device
│           ├── test-fpi-ssm
│           ├── umockdev-test.py
│           ├── virtual-device.py
│           └── virtual-image.py
└── share
    ├── gir-1.0
    │   └── FPrint-2.0.gir
    └── installed-tests
        └── libfprint-2
            ├── aes2501
            │   ├── capture.pcapng
            │   ├── capture.png
            │   └── device
            ├── aes3500
            │   ├── capture.ioctl
            │   ├── capture.png
            │   └── device
            ├── driver-aes2501.test
            ├── driver-aes3500.test
            ├── driver-egis0570.test
            ├── driver-elan-cobo.test
            ├── driver-elanmoc.test
            ├── driver-elanspi.test
            ├── driver-elan.test
            ├── driver-fpcmoc.test
            ├── driver-goodixmoc.test
            ├── driver-nb1010.test
            ├── driver-synaptics.test
            ├── driver-upektc_img-tcs1s.test
            ├── driver-upektc_img.test
            ├── driver-uru4000-4500.test
            ├── driver-uru4000-msv2.test
            ├── driver-vfs0050.test
            ├── driver-vfs301.test
            ├── driver-vfs5011.test
            ├── driver-vfs7552.test
            ├── egis0570
            │   ├── capture.pcapng
            │   ├── capture.png
            │   └── device
            ├── elan
            │   ├── capture.ioctl
            │   ├── capture.ioctl-recording
            │   ├── capture.png
            │   └── device
            ├── elan-cobo
            │   ├── capture.pcapng
            │   ├── capture.png
            │   └── device
            ├── elanmoc
            │   ├── custom.pcapng
            │   ├── custom.py
            │   └── device
            ├── elanspi
            │   ├── capture.ioctl
            │   ├── capture.png
            │   ├── device-hidraw
            │   └── device-spi
            ├── fpcmoc
            │   ├── custom.pcapng
            │   ├── custom.py
            │   └── device
            ├── fp-context.test
            ├── fp-device.test
            ├── fpi-assembling.test
            ├── fpi-device.test
            ├── fpi-ssm.test
            ├── goodixmoc
            │   ├── custom.pcapng
            │   ├── custom.py
            │   └── device
            ├── nb1010
            │   ├── capture.ioctl
            │   ├── capture.png
            │   └── device
            ├── prints
            │   ├── arch.jpg
            │   ├── arch.png
            │   ├── loop-right.jpg
            │   ├── loop-right.png
            │   ├── README
            │   ├── tented_arch.jpg
            │   ├── tented_arch.png
            │   ├── whorl.jpg
            │   └── whorl.png
            ├── synaptics
            │   ├── custom.pcapng
            │   ├── custom.py
            │   └── device
            ├── upektc_img
            │   ├── capture.pcapng
            │   ├── capture.png
            │   └── device
            ├── upektc_img-tcs1s
            │   ├── capture.pcapng
            │   ├── capture.png
            │   └── device
            ├── uru4000-4500
            │   ├── capture.pcapng
            │   ├── capture.png
            │   └── device
            ├── uru4000-msv2
            │   ├── capture.pcapng
            │   ├── capture.png
            │   └── device
            ├── vfs0050
            │   ├── capture.ioctl
            │   ├── capture.png
            │   ├── capture-recorded.ioctl
            │   └── device
            ├── vfs301
            │   ├── capture.ioctl
            │   ├── capture.png
            │   ├── capture-recorded.ioctl
            │   └── device
            ├── vfs5011
            │   ├── capture.ioctl
            │   ├── capture.png
            │   └── device
            ├── vfs7552
            │   ├── capture.ioctl
            │   ├── capture.png
            │   └── device
            ├── virtual-device.test
            └── virtual-image.test

36 directories, 120 files

Here is the relevant component of trees
libfprint

❯ tree lib
lib
├── girepository-1.0
│   └── FPrint-2.0.typelib
├── libfprint-2.so -> libfprint-2.so.2
├── libfprint-2.so.2 -> libfprint-2.so.2.0.0
├── libfprint-2.so.2.0.0
├── pkgconfig
│   └── libfprint-2.pc
└── udev
    ├── hwdb.d
    │   └── 60-autosuspend-libfprint-2.hwdb
    └── rules.d
        └── 70-libfprint-2.rules

6 directories, 7 files

my-libfprint

|-- env-vars
|-- lib
|   `-- udev
|       `-- rules.d
|           `-- 60-libfprint-2.rules
`-- usr
    |-- lib
    |   `-- x86_64-linux-gnu
    |       |-- libfprint-2.so.2 -> libfprint-2.so.2.0.0
    |       `-- libfprint-2.so.2.0.0
    `-- share
        |-- doc
        |   `-- libfprint-2-2
        |       |-- NEWS.gz
        |       |-- README
        |       |-- TODO
        |       |-- changelog.Debian.gz
        |       `-- copyright
        `-- lintian
            `-- overrides
                `-- libfprint-2-2

12 directories, 10 files

Atemu · November 5, 2024, 8:02pm

There’s your issue, it’s made for global-FHS distros that have a /usr/ and therefore puts its libs into usr/lib/. I don’t believe our pkg-config looks at that sub-path.

mv it to $out/lib/ instead so that it’s like the original libfprint.