Partial build log
this derivation will be built:
/nix/store/fpjwjkpxzym8zdhrbmh1xkwj6dnl8syz-vcs-7af28b6.drv
building '/nix/store/y837pvfldbzszcz6x9m30qpm4ci1ywns-vcs-7af28b6.drv'...
vcs> exporting https://github.com/Masterminds/vcs (rev 7af28b64c5ec41b1558f5514fd938379822c237c) into /nix/store/ay260wv6kpik04f0h1yk1lnyd371cfh7-vcs-7af28b6
vcs> Initialized empty Git repository in /nix/store/ay260wv6kpik04f0h1yk1lnyd371cfh7-vcs-7af28b6/.git/
vcs> remote: Enumerating objects: 23, done.
vcs> remote: Counting objects: 100% (23/23), done.
vcs> remote: Compressing objects: 100% (22/22), done.
vcs> remote: Total 23 (delta 6), reused 8 (delta 1), pack-reused 0
vcs> Unpacking objects: 100% (23/23), 29.06 KiB | 1.53 MiB/s, done.
vcs> From https://github.com/Masterminds/vcs
vcs> * tag 1.7.0 -> FETCH_HEAD
vcs> Switched to a new branch 'fetchgit'
vcs> removing `.git'...