https://github.com/Python-SIP/sip/issues/118
--- a/sipbuild/project.py
+++ b/sipbuild/project.py
@@ -1009,3 +1009,3 @@
         # ABI v14 requires Python v3.15 as a minimum.
-        if self.abi_version[0] >= 14 and version < (3, 15, 0):
+        if int(self.abi_version[0]) >= 14 and version < (3, 15, 0):
             version = (3, 15, 0)