I see a following error
[1 of 1] Compiling Main ( dist/setup/setup.hs, dist/setup/Main.o )
Linking dist/setup/setup ...
unrecognized 'configure' option `--with-runghc=/github/home/.ghcup/ghc/8.0.2/bin/runghc-8.0.2'
when compiling ghc-paths (which uses build-type: Custom).