diff --git a/lemon/CMakeLists.txt b/lemon/CMakeLists.txt
--- a/lemon/CMakeLists.txt
+++ b/lemon/CMakeLists.txt
@@ -4,9 +4,6 @@
   arg_parser.cc
   base.cc
   color.cc
-  lp_base.cc
-  lp_skeleton.cc
-  lp_utils.cc
   random.cc)
 
 INSTALL(