diff --git a/_custom_build/backend.py b/_custom_build/backend.py
index 83bb234..125845a 100644
--- a/_custom_build/backend.py
+++ b/_custom_build/backend.py
@@ -16,7 +16,7 @@
 
 def _cmake_required():
     try:
-        if _version.parse(_get_cmake_version()) >= _version.parse("3.12"):
+        if _version.parse(_get_cmake_version().split("-")[0]) >= _version.parse("3.12"):
             print("Using System version of cmake")
             return False
     except _SKBuildError: