$ cabal v1-build
Warning: No remote package servers have been specified. Usually you would have
one specified in the config file.
Resolving dependencies...
Warning: solver failed to find a solution:
Could not resolve dependencies:
[__0] trying: AoC-0.1.0.0 (user goal)
[__1] unknown package: matrix (dependency of AoC)
[__1] fail (backjumping, conflict set: AoC, matrix)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: AoC, matrix
Trying configure anyway.
Configuring AoC-0.1.0.0...
Error: [Cabal-8010]
Encountered missing or private dependencies:
    extra (missing), matrix (missing)

1 $ cabal v2-build
Warning: No remote package servers have been specified. Usually you would have
one specified in the config file.
Resolving dependencies...
Error: [Cabal-7107]
Could not resolve dependencies:
[__0] trying: AoC-0.1.0.0 (user goal)
[__1] unknown package: matrix (dependency of AoC)
[__1] fail (backjumping, conflict set: AoC, matrix)
After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: AoC, matrix

{
  pkgs ? import <nixpkgs> { },
}:
pkgs.haskellPackages.shellFor {
  name = "AoC";
  packages = h: [
    h.extra
    h.matrix
  ];
  nativeBuildInputs = [
    # Python
    # ...
    # Rust
    # ...
    # Haskell
    pkgs.cabal-install
    pkgs.haskell-language-server
    pkgs.haskellPackages.cabal-fmt
  ];
}

i'm trying to build simple liquidhaskell app (https://github.com/ulysses4ever/liquid-haskell-demo) with

# default.nix
(pkgs.haskellPackages.callCabal2nix "liquid-haskell-app" ./liquid-haskell-app {}).overrideAttrs (old: {
  nativeBuildInputs = (old.nativeBuildInputs or []) ++ [ pkgs.z3 ];
})

when I run nix-build I see that the builder runs haddock, which conflicts with liquid haskell (). I tried adding doHaddock = false; in the overrideAttrs but that didn't change a thing. What am I missing to turn off Haddock?

In reply to @sternenseemann:systemli.org
ners: it would already be helpful if you could open an issue for the problem and obtain the contents of config.log (written by autoconf). You can get that by building witih --keep-failed.

sterni: i tried

pkgs.haskell.lib.overrideCabal (pkgs.haskellPackages.callCabal2nix "liquid-haskell-app" ./liquid-haskell-app {}) (old: {
  nativeBuildInputs = (old.nativeBuildInputs or []) ++ [ pkgs.z3 ];
  doHaddock = false;
})

but that fails with a type error:

  error: function 'anonymous lambda' called with unexpected argument 'nativeBuildInputs'

In reply to @tks_123:matrix.org
Is there a way to add a haskell package as a flake (i.e. some other haskell project with its own flake.nix) into the haskellPackages of my own haskell project?