wildsebastian: thanks. this is how I am trying to deactivate tests for docutils package while trying to have a shell with `haskell.compiler.ghc862` but still tests getting triggered.

```
nix-shell -p '(haskell.packages.ghc862.override { overrides =  self : super:  { nixpkgs.python37Packages = super.python37Packages.override { overrides =  self: super: { docutils = super.docutils.overridePythonAttrs(old: {doCheck = false;}); }; }; }; }).ghc'

```