diff --git a/projects/riverbankcomputing.com/sip/package.yml b/projects/riverbankcomputing.com/sip/package.yml
index 25d36e73..94bf271d 100644
--- a/projects/riverbankcomputing.com/sip/package.yml
+++ b/projects/riverbankcomputing.com/sip/package.yml
@@ -8,7 +8,10 @@ versions:
     - /^rev\//
 dependencies:
   python.org: ~3.11
+  llvm.org: <17 # needs gcc to sip-install
 build:
+  dependencies:
+    gnu.org/make: '*'
   script:
     - python-venv.sh {{prefix}}/bin/sip-install
     - python-venv.sh {{prefix}}/bin/sip-build