# Pastebin tVGahefk
nix-env -iA nixpkgs.haskellPackages.cabal2nix \
            nixpkgs.haskellPackages.cabal-install \
            nixpkgs.haskellPackages.ghc
installing ‘cabal2nix-2.7.2’
installing ‘cabal-install-2.0.0.1’
installing ‘ghc-8.2.2’
building path(s) ‘/nix/store/plkccgk1g28d6ln1gkfa0i11nrlz3l9s-user-environment’
Wide character in die at /nix/store/64jc9gd2rkbgdb4yjx3nrgc91bpjj5ky-buildenv.pl line 79.
collision between ‘/nix/store/j6mv5dyabnn7riqy0nqkfsp5ricqq7gd-cabal2nix-2.7.2/lib/links/libHShashable-1.2.6.1-CqLaJxgPIOpH0VY2OuCehB-ghc8.2.2.dylib’ and ‘/nix/store/fjvcskx72kmy63f6jlv7cvqxyj5bikxj-cabal-install-2.0.0.1/lib/links/libHShashable-1.2.6.1-CqLaJxgPIOpH0VY2OuCehB-ghc8.2.2.dylib’; use ‘nix-env --set-flag priority NUMBER PKGNAME’ to change the priority of one of the conflicting packages
builder for ‘/nix/store/lgvbv44b1s3iw0da9b571mplf4k5886z-user-environment.drv’ failed with exit code 2
error: build of ‘/nix/store/lgvbv44b1s3iw0da9b571mplf4k5886z-user-environment.drv’ failed