Poetry2nix fails to grab hash of dependency

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1

Building

{src,poetry2nix,pkgs,fetchFromGitHub}:
let
      inherit (poetry2nix.lib.mkPoetry2Nix { inherit pkgs; }) mkPoetryApplication overrides;
in
mkPoetryApplication {
	projectDir=src; #taken from flake input
	overrides = overrides.withDefaults(final: prev:{
		orjson = prev.orjson.overrideAttrs(old:{
			src=fetchFromGitHub{
				inherit(old.src)owner repo rev;
				hash = "sha256-gKcj4LbmEx1QiDObial0+OJJmcLpjox5rPqVSHuf6tk=";
			};
		});
	});
}

the build fails with :

; nix build '.#fabric'
error:
       … while evaluating the attribute 'drvPath'

         at /nix/store/0jr2kk95c34c0b6yxi75q4fqgb43kqkm-source/lib/customisation.nix:365:7:

          364|     in commonAttrs // {
          365|       drvPath = assert condition; drv.drvPath;
             |       ^
          366|       outPath = assert condition; drv.outPath;

       … while calling the 'derivationStrict' builtin

         at /builtin/derivation.nix:9:12: (source not available)

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: hash mismatch in fixed-output derivation '/nix/store/7q53lc055sa7d30im6jnngfskpbg0h5l-source.drv':
         specified: sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
            got:    sha256-gKcj4LbmEx1QiDObial0+OJJmcLpjox5rPqVSHuf6tk=
; nix log '/nix/store/7q53lc055sa7d30im6jnngfskpbg0h5l-source.drv'
warning: The interpretation of store paths arguments ending in `.drv` recently changed. If this command is now failing try again with '/nix/store/7q53lc055sa7d30im6jnngfskpbg0h5l-source.drv^*'
sourcing setup hook '/nix/store/dv5vgsw8naxnkcc88x78vprbnn1pp44y-patchelf-0.15.0/nix-support/setup-hook'
sourcing setup hook '/nix/store/i4iynx9axbq23sd0gyrc5wdb46zz6z8l-update-autotools-gnu-config-scripts-hook/nix-support/setup-hook'
sourcing setup hook '/nix/store/h9lc1dpi14z7is86ffhl3ld569138595-audit-tmpdir.sh'
sourcing setup hook '/nix/store/m54bmrhj6fqz8nds5zcj97w9s9bckc9v-compress-man-pages.sh'
sourcing setup hook '/nix/store/wgrbkkaldkrlrni33ccvm3b6vbxzb656-make-symlinks-relative.sh'
sourcing setup hook '/nix/store/5yzw0vhkyszf2d179m0qfkgxmp5wjjx4-move-docs.sh'
sourcing setup hook '/nix/store/fyaryjvghbkpfnsyw97hb3lyb37s1pd6-move-lib64.sh'
sourcing setup hook '/nix/store/kd4xwxjpjxi71jkm6ka0np72if9rm3y0-move-sbin.sh'
sourcing setup hook '/nix/store/pag6l61paj1dc9sv15l7bm5c17xn5kyk-move-systemd-user-units.sh'
sourcing setup hook '/nix/store/jivxp510zxakaaic7qkrb7v1dd2rdbw9-multiple-outputs.sh'
sourcing setup hook '/nix/store/ilaf1w22bxi6jsi45alhmvvdgy4ly3zs-patch-shebangs.sh'
sourcing setup hook '/nix/store/cickvswrvann041nqxb0rxilc46svw1n-prune-libtool-files.sh'
sourcing setup hook '/nix/store/xyff06pkhki3qy1ls77w10s0v79c9il0-reproducible-builds.sh'
sourcing setup hook '/nix/store/aazf105snicrlvyzzbdj85sx4179rpfp-set-source-date-epoch-to-latest.sh'
sourcing setup hook '/nix/store/gps9qrh99j7g02840wv5x78ykmz30byp-strip.sh'

trying https://github.com/ijl/orjson/archive/3.10.0.tar.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100  887k    0  887k    0     0  1016k      0 --:--:-- --:--:-- --:--:-- 1501k
evaling implicit 'postFetch' string hook
unpacking source archive /build/3.10.0.tar.gz
calling 'unpackCmd' function hook '_defaultUnpack' /build/3.10.0.tar.gz

Why

2

At this point you usually replace an empty hash attribute with the value of “got”.

3

ok but I only wrote the above file. I expected that poetry2nix would extract the hash from the lock file or at least that the overlay would correct it

4

Overlays have nothing to do with setting hashes. Also, please share an example that we can build ourselves, as this isn’t sufficient to help troubleshoot IMO.