diff --git a/dev-util/mercurial/mercurial-1.5.bep b/dev-util/mercurial/mercurial-1.5.bep
index 41aaa693d..1e64863de 100644
--- a/dev-util/mercurial/mercurial-1.5.bep
+++ b/dev-util/mercurial/mercurial-1.5.bep
@@ -12,6 +12,6 @@ BUILD {
 
 INSTALL {
 	cd mercurial-1.5
-	([ -n $DESTDIR ] && python setup.py  install --root="$DESTDIR" --prefix="/boot/common" --force \
-	|| python setup.py  install --root="$DESTDIR" --prefix="/boot/common" --force)
+	([[ -n $DESTDIR ]] && python setup.py  install --root="$DESTDIR" --prefix="/boot/common" --force \
+	|| python setup.py install --prefix="/boot/common" --force)
 }