I have this problem when installin ghc from git: nstalling library in /home/bmaxa/ghc/lib/ghc-8.7.20181205/ghc-prim-0.5.3 dist-install/build/HSghc-prim-0.5.3.p_o: copyFile: does not exist (No such file or directory) p_o files are missing, and install fails. google does not helps. Can't find any option to suppress installation of p_o files or to build them. Thanks, Branimir.