There is an incorrect hash for nimbus-eth2 source in pkgs/nimbus/default.nix:

       error: hash mismatch in fixed-output derivation '/nix/store/22iaddgnc87gw22869vjkr7p65x5a4b3-source.drv':
         specified: sha256-aPyfbQ1983jaWL2XI0yyLHXYegIPT7ugPbFfid5pkfo=
            got:    sha256-INALxgkuZ4kT/DrpzMBqgNeM8Ar78BRccmGWtqoGhB0=

Thanks for your Pull Request!

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There is an incorrect hash for nimbus-eth2 source in pkgs/nimbus/default.nix:

       error: hash mismatch in fixed-output derivation '/nix/store/22iaddgnc87gw22869vjkr7p65x5a4b3-source.drv':
         specified: sha256-aPyfbQ1983jaWL2XI0yyLHXYegIPT7ugPbFfid5pkfo=
            got:    sha256-INALxgkuZ4kT/DrpzMBqgNeM8Ar78BRccmGWtqoGhB0=

That's odd as I got sha256-aPyfbQ1983jaWL2XI0yyLHXYegIPT7ugPbFfid5pkfo= as well:

nurl -S https://github.com/status-im/nimbus-eth2 v25.2.0
$ nix flake prefetch --extra-experimental-features 'nix-command flakes' --json git+https://github.com/status-im/nimbus-eth2?ref=refs/tags/v25.2.0&submodules=1
fetchFromGitHub {
  owner = "status-im";
  repo = "nimbus-eth2";
  rev = "v25.2.0";
  hash = "sha256-aPyfbQ1983jaWL2XI0yyLHXYegIPT7ugPbFfid5pkfo=";
  fetchSubmodules = true;
}

I'll try the same with fake hash to see if I get sha256-INALxgkuZ4kT/DrpzMBqgNeM8Ar78BRccmGWtqoGhB0=.

Okay, I've reproduced the hash by using the fakeHash approach:

I've then compared the outputs of the 2 fixed-output-derivation expressions:

Diffing the individual files shows that these obtained via

nix flake prefetch --json git+https://github.com/status-im/nimbus-eth2?ref=refs/tags/v25.2.0&submodules=1

have Unix line endings (LF), while these obtained via:

pkgs.fetchFromGitHub {
  owner = "status-im";
  repo = "nimbus-eth2";
  rev = "v25.2.0";
  hash = "sha256-INALxgkuZ4kT/DrpzMBqgNeM8Ar78BRccmGWtqoGhB0";
  fetchSubmodules = true;
}

have Windows line endings CRLF.