diff --git a/pkgs/tools/typesetting/tex/texlive/combine.nix b/pkgs/tools/typesetting/tex/texlive/combine.nix
index 35fee64ba54f..3bf7ee1fdfec 100644
--- a/pkgs/tools/typesetting/tex/texlive/combine.nix
+++ b/pkgs/tools/typesetting/tex/texlive/combine.nix
@@ -30,7 +30,7 @@ let
     pkgNeedsRuby = pkg: pkg.tlType == "run" && pkg.pname == "match-parens";
     extraInputs =
       lib.optional (lib.any pkgNeedsPython splitBin.wrong) python
-      ++ lib.optional (lib.any pkgNeedsPython splitBin.wrong) ruby;
+      ++ lib.optional (lib.any pkgNeedsRuby splitBin.wrong) ruby;
   };
 
   mkUniquePkgs = pkgs: fastUnique (a: b: a < b) # highlighting hack: >