Build failure: littlegptracker.src

[Jayman2000]

Nixpkgs version

• Unstable (26.05)

Steps to reproduce

1. Create a file named littlegptracker-src.nix that contains the following Nix expression:

   # This file is dedicated to the public domain using 🅭🄍1.0:
   # <https://creativecommons.org/publicdomain/zero/1.0>.
   let
     nixpkgsCommit = "2a75bb5a0a58c4ecb5ef7cf66e8ccca4f6553f79";
     nixpkgsDirectory = builtins.fetchTarball {
       url = "https://github.com/NixOS/nixpkgs/archive/${nixpkgsCommit}.tar.gz";
       sha256 = "1ask7qzfs7g5fkihx8drs8ivmq81jnw1nly3s509ydybrm1hz92l";
     };
     pkgs = import nixpkgsDirectory { };
   in
   pkgs.littlegptracker.src

2. Attempt to build that Nix expression by running the following command:

   nix-build <path to littlegptracker-src.nix>

Can Hydra reproduce this build failure?

Yes, Hydra can reproduce this build failure.

Link to Hydra build job

https://hydra.nixos.org/job/nixpkgs/unstable/littlegptracker.x86_64-linux

Relevant log output

this derivation will be built:
  /nix/store/4j84lq1a7zc5gfc6dhrjzzwqhxbnhkzl-source.drv
building '/nix/store/4j84lq1a7zc5gfc6dhrjzzwqhxbnhkzl-source.drv'...
structuredAttrs is enabled

trying https://github.com/djdiskmachine/littlegptracker/archive/refs/tags/1.5.0.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  5.77M   0  5.77M   0      0  4.18M      0           00:01          4.16M
unpacking source archive /build/download.tar.gz
error: hash mismatch in fixed-output derivation '/nix/store/4j84lq1a7zc5gfc6dhrjzzwqhxbnhkzl-source.drv':
         specified: sha256-SidrFsqAn0JQqthEoYA9H0RdF6jeCeP2Pe+UpAbbL48=
            got:    sha256-j6r2iFJ3YJ3XOHwn/ENQmpZyIdMAdrWXd+EO3EWIBCw=

Additional context

No response

System metadata

• system: "x86_64-linux"
• host os: Linux 6.12.74, NixOS, 25.11 (Xantusia), 25.11.6913.fabb8c9deee2
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.31.2
• channels(root): "nixos-25.11"
• nixpkgs: /nix/store/whilq7inyndwdakb4syfvjprdmj2bb7g-nixos-25.11/nixos

Notify maintainers

@fgaz

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