--- a/CMakeLists.txt	Tue May 03 01:13:41 2016 +0200
+++ b/CMakeLists.txt	Mon May 02 22:52:21 2016 -0400
@@ -58,6 +58,7 @@
     endif()
 
     set(BUILD_ENGINE_C ON CACHE STRING "Required for BUILD_ENGINE_JS" FORCE)
+    set(BUILD_ENGINE_LIBRARY ON CACHE STRING "Required for BUILD_ENGINE_JS" FORCE)
     set(NOAUTOUPDATE ON CACHE STRING "Required for BUILD_ENGINE_JS" FORCE)
     set(PHYSFS_SYSTEM OFF CACHE STRING "Required for BUILD_ENGINE_JS" FORCE)
     set(LUA_SYSTEM OFF CACHE STRING "Required for BUILD_ENGINE_JS" FORCE)