diff --git a/helpers/make-dpkg b/helpers/make-dpkg
index 4a3e36f..6651cb1 100644
--- a/helpers/make-dpkg
+++ b/helpers/make-dpkg
@@ -38,7 +38,7 @@ sed 's/Ubuntu/Trisquel/g' -i scripts/t/Dpkg_BuildFlags_Trisquel.t
 
 # Patch a copy from the Ubuntu.pm file to force track changes more often,
 # and rebuild easier the original changes.
-cp scripts/Dpkg/Vendor/{Ubuntu,Trisquel}.pm
+cp scripts/Dpkg/Vendor/Ubuntu.pm scripts/Dpkg/Vendor/Trisquel.pm
 patch_p1 $DATA/patch-Trisquel_pm-from-Ubuntu_pm.patch
 
 # Use patch to track changes at Makefile.{in,am} files.