.nix

    nixpkgs.overlays = [
        (self: super: {
            python3 = super.python3.override {
                packageOverrides = python-self: python-super: {
                    pycurl = python-super.pycurl.overrideAttrs (oldAttrs: {
                        doCheck = false;
                    });
                };
            };
        })
    ];