diff --git a/GNUmakefile b/GNUmakefile
index 0d51bcb..a8ec5c5 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -1,4 +1,4 @@
-FILES := $(wildcard *.el)
+FILES := $(wildcard oni-*.el)
 
 PACKAGE_TARGETS := $(addprefix package-,$(FILES))