The output of haskell-packages/default.nix at the moment looks something like this:
{ nixpkgs ? import <nixpkgs> {} }:
with nixpkgs;
let ...
in callPackage (nixpkgs.path + "/pkgs/development/haskell-modules") {
ghc = pkgs.haskell.compiler.ghc843;
buildHaskellPackages = buildPackages.haskell.packages.ghc843;
...
}It would be probably nicer if the compiler were another parameter. e.g.:
{ nixpkgs ? import <nixpkgs> {}, compiler ? "ghc843" }:
with nixpkgs;
let ...
in callPackage (nixpkgs.path + "/pkgs/development/haskell-modules") {
ghc = pkgs.haskell.compiler.${compiler};
buildHaskellPackages = buildPackages.haskell.packages.${compiler};
...
}That way one could more easily reuse the same expression with newer versions of nixpkgs, in particular one where only ghc844 is available.
The output of
haskell-packages/default.nixat the moment looks something like this:{ nixpkgs ? import <nixpkgs> {} }: with nixpkgs; let ... in callPackage (nixpkgs.path + "/pkgs/development/haskell-modules") { ghc = pkgs.haskell.compiler.ghc843; buildHaskellPackages = buildPackages.haskell.packages.ghc843; ... }It would be probably nicer if the compiler were another parameter. e.g.:
{ nixpkgs ? import <nixpkgs> {}, compiler ? "ghc843" }: with nixpkgs; let ... in callPackage (nixpkgs.path + "/pkgs/development/haskell-modules") { ghc = pkgs.haskell.compiler.${compiler}; buildHaskellPackages = buildPackages.haskell.packages.${compiler}; ... }That way one could more easily reuse the same expression with newer versions of nixpkgs, in particular one where only
ghc844is available.