question! So I can't upgrade the package gtk2hs-buildtools-0.13.4.0 because of a cabal version constraint problem. I'm going to report it, but in the meantime how could I update the derivations left to upgrade?

@otini Check out nixpkgs repo, create new branch, modify the Nix-expression, specify that your nixpkgs tree for nix-env (-I)?

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@amiloradovsky Which expression should I modify to ignore an update? 😐

@otini I have exactly zero experience with Cabal, so I probably can't help with that.

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