installing
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/s501z1pjgcqvqqhj7vgib4l8pvb07fih-keeagent-0.10.1
strip is /nix/store/gpc2wld1s0c6qzx9326cwn1wcx29xzsj-binutils-2.30/bin/strip
stripping (with command strip and flags -S) in /nix/store/s501z1pjgcqvqqhj7vgib4l8pvb07fih-keeagent-0.10.1/lib
patching script interpreter paths in /nix/store/s501z1pjgcqvqqhj7vgib4l8pvb07fih-keeagent-0.10.1
checking for references to /build in /nix/store/s501z1pjgcqvqqhj7vgib4l8pvb07fih-keeagent-0.10.1...
building '/nix/store/bdq7kw1b8w0grn9c2pxxym91162v3w42-keeagent-0.10.1.drv'...
created 62 symlinks in user environment
/nix/store/q12g1dgvx2dd90grfrj7r81j1bchywy8-keeagent-0.10.1

a) For `nixos-rebuild` you can set
  { nixpkgs.config.allowUnsupportedSystem = true; }
in configuration.nix to override this.

b) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
  { allowUnsupportedSystem = true; }
to ~/.config/nixpkgs/config.nix.

make[4]: *** [Makefile:53: profile-do--basic--all] Error 2
make[3]: *** [Makefile:49: profiles-do--all] Error 2
make[2]: *** [Makefile:636: all-local] Error 2
make[2]: Leaving directory '/build/mono-5.8.0.108/runtime'
make[1]: *** [Makefile:549: all-recursive] Error 1
make[1]: Leaving directory '/build/mono-5.8.0.108'
make: *** [Makefile:479: all] Error 2
builder for '/nix/store/wi9nhzwds2aifh7nwvpmfw5skak7i967-mono-5.8.0.108.drv' failed with exit code 2
cannot build derivation '/nix/store/l14c8f1rrga4x16hhwa08fr8pzlcfls6-keeagent-0.10.1.drv': 1 dependencies couldn't be built
error: build of '/nix/store/l14c8f1rrga4x16hhwa08fr8pzlcfls6-keeagent-0.10.1.drv' failed