diff --git a/gnu/packages/ocaml.scm b/gnu/packages/ocaml.scm
index 074f830358..c14d83c016 100644
--- a/gnu/packages/ocaml.scm
+++ b/gnu/packages/ocaml.scm
@@ -569,7 +569,8 @@ (define-public unison
     (native-inputs
      `(("ocaml" ,ocaml)
        ;; For documentation
-       ("ghostscript" ,ghostscript-gs)
+       ("ghostscript-gs" ,ghostscript-gs)
+       ("ghostscript" ,ghostscript)
        ("texlive" ,texlive)
        ("hevea" ,hevea)
        ("lynx" ,lynx)))