Error overriding library

[billksun]

I tried to follow the instructions for overriding library versions here: https://srid.ca/haskell-template/dependency

However, I am getting the following error:

error: attribute 'callCabal2Nix' missing

       at /nix/store/pf28nmzgqjy7sarx5rlhay83jharcrm0-source/flake.nix:30:34:

           29|           overrides = self: super: with pkgs.haskell.lib; {
           30|             ihp-hsx = dontCheck (self.callCabal2Nix "ihp-hsx" inputs.ihp-hsx {});
             |                                  ^
           31|           };
       Did you mean callCabal2nix?
(use '--show-trace' to show detailed location information)

[daanrs]

I am not the library author, so I might be wrong, but I will try my best to help!

This error is luckily just a typo (I've made the same mistake before), if you use

overrides = self: super: with pkgs.haskell.lib; {
    ihp-hsx = dontCheck (self.callCabal2nix "ihp-hsx"  inputs.ihp-hsx {});
};

it should work.

Note that in this case you are overriding the ihp-hsx package with a flake input. If you for instance want to override the pre-existing package in nixpkgs to just disable the tests, then you can use something like

overrides = self: super: with pkgs.haskell.lib; {
    ihp-hsx = dontCheck super.ihp-hsx;
};