opencv3WithoutCuda 3.4.18 -> 4.7.0 https://github.com/opencv/opencv/releases attrpath: opencv3WithoutCuda Received ExitFailure 1 when running Raw command: /nix/store/3nqhcyc7vid1npgcd0m7arg5sn325nhz-nix-2.12.0/bin/nix eval -f . "(let pkgs = import ./. {}; in builtins.hasAttr \"updateScript\" pkgs.opencv3WithoutCuda)" Standard error: error: attribute '(let pkgs = import ' in selection path '(let pkgs = import ./. {}; in builtins.hasAttr "updateScript" pkgs.opencv3WithoutCuda)' not found