How do I run a nix-shell with a specific version of ghc installed? I think I tried everything that came to my mind:
~~~~ › nix-shell '<nixpkgs>' -A haskell-ng.compiler.ghc763 [nix-shell:~/tmp]$ which ghc /nix/store/mgs1il4qvvd70s50p2v8j2pxm50k7ias-ghc-7.0.4-binary/bin/ghc ~~~~ hmmm… ~~~~ › nix-shell '<nixpkgs>' -A haskell-ng.packages.ghc784.ghc these paths will be fetched (73.48 MiB download, 862.92 MiB unpacked): /nix/store/w4il8kp2jhmhmaxplx7i04y838k583mk-ghc-7.4.2-binary fetching path ‘/nix/store/w4il8kp2jhmhmaxplx7i04y838k583mk-ghc-7.4.2-binary’... ~~~~ It looks like it is trying to bootstrap ghc or something…
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