diff --git a/var/spack/repos/builtin/packages/alps/package.py b/var/spack/repos/builtin/packages/alps/package.py
index 7b1be15a83c..78e2254fc96 100644
--- a/var/spack/repos/builtin/packages/alps/package.py
+++ b/var/spack/repos/builtin/packages/alps/package.py
@@ -43,6 +43,11 @@ class Alps(CMakePackage):
 
     extends("python")
 
+    # https://github.com/ALPSim/ALPS/issues/9
+    conflicts(
+        "%gcc@14", when="@:2.3.3-beta.6", msg="use gcc older than version 14 or else build fails"
+    )
+
     # See https://github.com/ALPSim/ALPS/issues/6#issuecomment-2604912169
     # for why this is needed
     resources = {