Partial build log
this derivation will be built:
/nix/store/8cf1mz47qrywfrgkrl7yvfiarlg7q0q3-source.drv
building '/nix/store/51lwvq97sijgz5xw5xnd0km2vs20dvfi-source.drv'...
source> exporting https://github.com/gnustep/libobjc2.git (rev v2.1) into /nix/store/niv67dj49vak5lcqbix63jpqhm8wbddg-source
source> Initialized empty Git repository in /nix/store/niv67dj49vak5lcqbix63jpqhm8wbddg-source/.git/
source> remote: Enumerating objects: 188, done.
source> remote: Counting objects: 100% (188/188), done.
source> remote: Compressing objects: 100% (174/174), done.
source> remote: Total 188 (delta 12), reused 63 (delta 7), pack-reused 0
source> Receiving objects: 100% (188/188), 236.24 KiB | 2.29 MiB/s, done.
source> Resolving deltas: 100% (12/12), done.
source> From https://github.com/gnustep/libobjc2
source> * tag v2.1 -> FETCH_HEAD
source> Switched to a new branch 'fetchgit'
source> Submodule 'third_party/robin-map' (https://github.com/Tessil/robin-map) registered for path 'third_party/robin-map'
source> Initialized empty Git repository in /nix/store/niv67dj49vak5lcqbix63jpqhm8wbddg-source/third_party/robin-map/.git/
source> remote: Enumerating objects: 26, done.
source> remote: Counting objects: 100% (26/26), done.
source> remote: Compressing objects: 100% (24/24), done.
source> remote: Total 26 (delta 3), reused 7 (delta 0), pack-reused 0
source> Unpacking objects: 100% (26/26), 68.40 KiB | 2.14 MiB/s, done.
source> From https://github.com/Tessil/robin-map
source> * branch 757de829927489bee55ab02147484850c687b620 -> FETCH_HEAD
source> Switched to a new branch 'fetchgit'
source> removing `.git'...