Devenv build fails

[SomeoneSerge]

Steps to reproduce:

$ nix-shell --arg cudaSupport true --argstr cudaMajorVersion 10 --command ghci

Expected:
A ghci repl with hasktorch available

Observed:

trace: Using latest index state for hasktorch-skeleton!
trace: Using index-state: 2020-08-13T00:00:00Z for hasktorch-skeleton
trace: Shell for hasktorch hasktorch-skeleton libtorch-ffi libtorch-ffi-helper
trace: Shell for hasktorch hasktorch-skeleton libtorch-ffi libtorch-ffi-helper
trace: Using latest index state for cabal-install!
trace: Using index-state: 2020-08-13T00:00:00Z for cabal-install
trace: WARNING: No sha256 found for source-repository-package https://github.com/bubba/brittany.git c59655f10d5ad295c2481537fc8abf0a297d9d1c download may fail in restricted mode (hydra)
fatal: couldn't find remote ref refs/heads/c59655f10d5ad295c2481537fc8abf0a297d9d1c
error: --- Error ------------------------------------------------------------------------------------------------------------------------------------------------------ nix-shell
program 'git' failed with exit code 128
(use '--show-trace' to show detailed location information)```

[SomeoneSerge]

Environment:

$ nix run nixpkgs#nix-info -- -m
 - system: `"x86_64-linux"`
 - host os: `Linux 5.8.10-1-default, openSUSE Tumbleweed, noversion`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 3.0pre20200829_f156513`
 - channels(root): `"nixpkgs-21.03pre243895.72b9660dc18"`
 - channels(serge): `"home-manager, nixpkgs-unstable-21.03pre244416.daaa0e33505"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixpkgs`