emacsPackages.jq-mode: patch in jq program

        # https://github.com/fred-o/jekyll-modes/issues/6

        jekyll-modes = addPackageRequires super.jekyll-modes [ self.poly-markdown ];

        jq-mode = super.jq-mode.overrideAttrs (attrs: {

          postPatch = attrs.postPatch or "" + ''

            substituteInPlace jq-mode.el \

              --replace-fail 'jq-interactive-command "jq"' 'jq-interactive-command "${lib.getExe pkgs.jq}"'

            substituteInPlace ob-jq.el \

              --replace-fail 'org-babel-jq-command "jq"' 'org-babel-jq-command "${lib.getExe pkgs.jq}"'

          '';

        });

        jss = ignoreCompilationError super.jss; # elisp error

        # missing optional dependencies: vterm or eat