devos/pkgs/override.nix

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# Packages inherited are imported in hosts/default.nix, and are pulled from
# nixpkgs master instead of the default nixos release. This doesn't actually
# install them, just creates an overlay to pull them from master if they are
# installed by the user elsewhere in the configuration.
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pkgs: final: prev:
{
inherit (pkgs)
manix;
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haskellPackages = prev.haskellPackages.override {
overrides = hfinal: hprev:
let version = prev.lib.replaceChars [ "." ] [ "" ] prev.ghc.version;
in
{
# same for haskell packages, matching ghc versions
inherit (pkgs.haskell.packages."ghc${version}")
haskell-language-server;
};
};
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}