mlterm: build fails due to missing tar file (nixos-unstable)

[barryfm]

Describe the bug

When building system containing mlterm, the github derived file name for the source package
does not exist.

Steps To Reproduce

Steps to reproduce the behavior:

1. nix-build -A mlterm

or include mlterm in nixos-rebuild switch --update

Gets error:

building '/nix/store/g90wwdp19hpd8s1v6mcz75g7zk937zyb-source.drv'...

trying https://github.com/arakiken/mlterm/archive/rel-3_9_2.tar.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   126  100   126    0     0    461      0 --:--:-- --:--:-- --:--:--   463
  0    14    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
curl: (22) The requested URL returned error: 404
error: cannot download source from any mirror
error: builder for '/nix/store/g90wwdp19hpd8s1v6mcz75g7zk937zyb-source.drv' failed with exit code 1
error: 1 dependencies of derivation '/nix/store/0b899pv8xyrfq65w0cs2v017pcbw4nfk-mlterm-3.9.2.drv' failed to build

Expected behavior

A sucessfull build or install

Notify maintainers

@vrthra @RamKromberg @Atemu

Metadata

Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

 /nix/store/jaa5l5g36aj1wwlmk9lqhslclmdqms3x-bash-interactive-5.1-p12-dev
copying path '/nix/store/jaa5l5g36aj1wwlmk9lqhslclmdqms3x-bash-interactive-5.1-p12-dev' from 'https://cache.nixos.org'...
 - system: `"x86_64-linux"`
 - host os: `Linux 5.10.93, NixOS, 22.05 (Quokka)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.5.1`
 - channels(root): `"nixos-22.05pre348581.c07b471b52b"`
 - channels(barry): `""`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

[Atemu]

Fixed by #156860

In the meantime, run nix-build https://github.com/NixOS/nixpkgs/archive/fb2b2f59c83316e727dc679f1b8b65afd692cccb.tar.gz -A mlterm.src and then your system should build again.