Install local .deb file on flake.nix

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1

Hello, I’m trying to install local .deb files on flake.nix without adding .deb flies on git too.
My directory is:

example folder
|-flake.nix
|-debs
|\1.deb
|\2.deb
|\...
|-install-deb.nix

Now, I wrote flake.nix such as

  inputs = {
    extrapkg.url = "git+https://anotherpkgurl";
  };

  outputs = { self, extrapkg }:
    let
      pkgs = extrapkg.pkgs;
      artiq = extrapkg.packages.x86_64-linux;
      debs = builtins.path {
        path = ./debs;
        name = "debs";
      };
      deb-install = import ./install-deb.nix {
        inherit (pkgs) stdenv dpkg lib;
            debs_directory = debs;
        };
}
in {
      # Define the development shells
      devShells.x86_64-linux.default = pkgs.mkShell {
        buildInputs = [
          (pkgs.python310.withPackages (ps: with ps; [ myPython ]))
          deb-install
        ];
          shellHook = ''
          export CPLUS_INCLUDE_PATH=${deb-install}/include
          export LIBRARY_PATH=${deb-install}/lib
          export LD_LIBRARY_PATH=${deb-install}/lib:$LD_LIBRARY_PATH
        '';
      };

      packages.x86_64-linux.deb-install = deb-install;

This is my install-deb.nix

{ stdenv, dpkg, lib, debs_directory }:

stdenv.mkDerivation rec {
  pname = "examplename";
  version = "4.2.0.46";

  src = debs_directory;

  nativeBuildInputs = [ dpkg ];

  unpackPhase = ''
    echo "SRC path is: $src"
    echo "Listing .deb files..."
    ls -l $src/*.deb || echo "No .deb files found"

    for deb in $src/*.deb; do
      echo "Unpacking $deb..."
      dpkg-deb -x "$deb" .
    done
  '';

  installPhase = ''
    echo "Contents after dpkg unpack:"
    ls -R .
    mkdir -p $out
    cp -r * $out
  '';

  meta = with lib; {
    description = "examples (.deb unpacked)";
    platforms = platforms.linux;
  };
}

Now, when I tested using

nix build .#deb-install --impure --show-trace --print-build-logs --no-write-lock-file

It says

aqp-linux@aqp-linux-inspiron:~/aqpcontrol_test/aqpcontrol$ nix build .#deb-install --impure --show-trace --print-build-logs --no-write-lock-file
error:
       … while calling the 'derivationStrict' builtin
         at <nix/derivation-internal.nix>:34:12:
           33|
           34|   strict = derivationStrict drvAttrs;
             |            ^
           35|

       … while evaluating derivation 'examplename-4.2.0.46'
         whose name attribute is located at /nix/store/vj980b72z6zb0yg6v0a7nzc9rcww3jmn-source/pkgs/stdenv/generic/make-derivation.nix:480:13

       … while evaluating attribute 'src' of derivation 'examplename-4.2.0.46'
         at /nix/store/lnsgjnis0x04bx2mnjdmrm0wc5gz8ws8-source/spinnaker-sdk.nix:7:3:
            6|
            7|   src = debs_directory;
             |   ^
            8|

       … while calling the 'path' builtin
         at /nix/store/lnsgjnis0x04bx2mnjdmrm0wc5gz8ws8-source/flake.nix:14:24:
           13|       artiq = extrapkg.packages.x86_64-linux;
           14|       debs = builtins.path {
             |            ^
           15|         path = ./debs;

       … while adding path '/nix/store/lnsgjnis0x04bx2mnjdmrm0wc5gz8ws8-source/debs'

       error: path '/nix/store/lnsgjnis0x04bx2mnjdmrm0wc5gz8ws8-source/debs' does not exist

It seems like flake.nix can’t find right directory.
Is it possible to install some local library without putting on git?
Thanks

2

The easiest and quickest solution to this is probably to use a path: flake.

The alternative would be to use requireFile for the src. Or any of the online fetchers.