diff --git a/ckb-next.spec b/ckb-next.spec
index 0755fd2..5848d72 100644
--- a/ckb-next.spec
+++ b/ckb-next.spec
@@ -45,6 +45,9 @@ Provides:       bundled(kissfft)
 # ckb-next, as the name suggests, is a re-activation and continuation of "ckb"
 Obsoletes:      ckb
 
+# Force an out-of-source build (default in F33+)
+%undefine __cmake_in_source_build
+
 
 %description
 ckb-next is an open-source driver for Corsair keyboards and mice. It aims to