Partial build log
this derivation will be built:
/nix/store/bni1a1f3q4j01si4sjra311y3zq8dfr3-go-mtpfs-1.0.0-go-modules.drv
building '/nix/store/l9xwn465dxg5m6z5lpmp4q9k71gv21h1-go-mtpfs-1.0.0-go-modules.drv'...
go-mtpfs> unpacking sources
go-mtpfs> unpacking source archive /nix/store/4xkbzdmqlkv1ic9f1bq33kzj0qvy5j06-source
go-mtpfs> source root is source
go-mtpfs> patching sources
go-mtpfs> configuring
go-mtpfs> building
go-mtpfs> go: downloading github.com/hanwen/usb v0.0.0-20141217151552-69aee4530ac7
go-mtpfs> go: downloading github.com/hanwen/go-fuse/v2 v2.0.2
go-mtpfs> go: downloading github.com/hanwen/go-fuse v1.0.0
go-mtpfs> go: downloading golang.org/x/sys v0.0.0-20190826190057-c7b8b68b1456
go-mtpfs> installing