3rdparty: Add additional build facilities for 3rd-party code
diff --git a/include/CMakeLists.txt b/include/CMakeLists.txt
index ef33fe8..c2f2bd4 100644
--- a/include/CMakeLists.txt
+++ b/include/CMakeLists.txt
@@ -3,9 +3,8 @@
 if(INSTALL_MBEDTLS_HEADERS)
 
     file(GLOB headers "mbedtls/*.h")
-    file(GLOB headers_everest "../3rdparty/everest/include/*.h")
 
-    install(FILES ${headers} ${headers_everest}
+    install(FILES ${headers}
         DESTINATION include/mbedtls
         PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)