diff --git a/kdecvs-build b/kdecvs-build
index 5a6a825..4910c27 100755
--- a/kdecvs-build
+++ b/kdecvs-build
@@ -1936,6 +1936,9 @@ sub update_module_environment
     if (get_option ($module, "use-unsermake"))
     {
         setenv ("PATH", "$kdecvs/kdenonbeta/unsermake:$ENV{PATH}");
+
+        # Try to remain compatible with older unsermake and /admin
+        setenv ("UNSERMAKE", "$kdecvs/kdenonbeta/unsermake/unsermake");
     }
     else
     {