--- a/Makefile	Mon Feb 17 13:44:36 2020 +0200
+++ b/Makefile	Sun Feb 23 14:45:23 2020 +0200
@@ -65,7 +65,7 @@
 ################################################################
 # Proj dirs/files.
 
-EL_FILES := $(wildcard *.el)
+EL_FILES := $(filter-out %.dev.el,$(wildcard *.el))
 ELC_FILES := $(EL_FILES:.el=.elc)
 
 RST_FILES := $(wildcard *.rst)