# haskell.nix provides access to the nixpkgs pins which are used by our CI, hence
 # you will be more likely to get cache hits when using these.
 # But you can also just use your own, e.g. '<nixpkgs>'

nixpkgsSrc = <nixpkgs>;
Про

the string '/nix/store/y0z0ybq721gdp8qzly6qlqg8sldnbfmf-ghc-8.8.3' is not allowed to refer to a store path

addExtraLibrary = drv: x: addExtraLibraries drv [x];
addExtraLibraries = drv: xs: overrideCabal drv (drv: { extraLibraries = (drv.extraLibraries or []) ++ xs; });