Hello all, I am unable to compile ghc-8.2.2 with ghc-8.4.3 (which is otherwise working fine, e.g. to compile my own projects and xmonad). Could somebody please help? The error I get is ghc-cabal: Encountered missing dependencies: base >=4.4.1 && <4.11 libraries/hpc/ghc.mk:3: libraries/hpc/dist-boot/package-data.mk: No such file or directory make[1]: *** [libraries/hpc/ghc.mk:3: libraries/hpc/dist-boot/package-data.mk] Error 1 make: *** [Makefile:123: all] Error 2 I should give some background as to why I'm doing this: I am trying to build a back catalogue of ghc installations because the older binary downloads from haskell.org give me linking errors and I've lost faith in Archlinux's ability to package ghc. I plan on using these builds of ghc in stack, instead of their binaries. I don't like downloading binaries. I'd rather build them from source. I will also create a docker image for my own CI purposes. I'm using this script, but it's just a formalisation of the ghc installation instructions to help me automate the process. https://gitlab.com/fommil/ghc-env/blob/master/bin/ghc-env I am on Archlinux, which (I'm sure many of you know) has a very broken concept of ghc. I already lost 2 hours today because Archlinux broke my ~/.ghc, and therefore xmonad was unable to start and this locked me out of my desktop. I plan on using NixOS in the future. From a fresh OS install I do pacman -S ghc-static cabal-install to get me ghc 8.4.3 and the cabal CLI. From here I download and compile ghc 8.4.3 and cabal-install with ghc-env compile 8.4.3 cabal install cabal-install xmonad xmonad-contrib and now I can delete Arch's versions of ghc (yay!). But from here, if I try to compile ghc 8.2.2 (with a view to compile all the way back to the 7.x series) I get the failure at the top. An alternative solution would be if there were instructions for a fabled "phase0" compile, which doesn't require a ghc bootstrap. Does anybody know anything about that? Best regards, Sam