fix typo with detecting uglify-js
diff --git a/static/CMakeLists.txt b/static/CMakeLists.txt
index 4c0ab32..b5a53ec 100644
--- a/static/CMakeLists.txt
+++ b/static/CMakeLists.txt
@@ -69,7 +69,7 @@
 
 set(STATIC_ASSETS_OUT "")
 set(MINIFIED_ASSETS_OUT "")
-find_program(CSS_MINIFIER uglifyjs)
+find_program(UGLIFY_MINIFIER uglifyjs)
 if(NOT UGLIFY_MINIFIER)
     message("uglifyjs not found")
 endif()