Hello fellow Haskellers, I have a bunch of local Haskell packages, mostly libraries. The package X lives in the directory `<ertes-src/X/main>`. There are lots of direct and indirect dependencies between them. My current solution is ad hoc and rather ugly. I'm using the following hand-crafted `shell.nix` file in every project:
{ pkgs ? import <nixpkgs> {} }: let inherit (pkgs.haskellngPackages) callPackage; extPkg = path: deps: (callPackage (import path) deps).override (args: args // { mkDerivation = expr: args.mkDerivation (expr // { src = pkgs.fetchdarcs { url = path; }; }); }); thisPkg = callPackage (import ./devel.nix) { direct-dep1 = extPkg <ertes-src/dep1/main> { indirect-dep1 = ...; indirect-dep2 = ...; }; direct-dep2 = extPkg <ertes-src/dep2/main> {}; }; in thisPkg.env Do not pay too much attention to the `extPkg` function. It just works around cabal2nix' lack of support for Darcs URLs. My question is: Is there a nicer and more principled way to solve this? Ideally I could simply add all of my local packages in some way to my `~/.nixpkgs/config.nix`. Then they could just depend on each other regularly and I wouldn't need any shell.nix hackery. I'm guessing that I need to override haskellngPackages in some way or perhaps create my own using some override. Greets, Ertugrul
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