diff --git a/ghc-pkg-wrapper b/ghc-pkg-wrapper
index 9abd6e1..f9c2332 100755
--- a/ghc-pkg-wrapper
+++ b/ghc-pkg-wrapper
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-[ $# -lt 1 ] && echo "Usage: `basename $0` %{buildroot}%{ghclibdir} ..." && exit 1
+[ $# -lt 1 ] && echo "Usage: $(basename $0) %{buildroot}%{ghclibdir} ..." && exit 1
 
 set +x -e