diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 61d51ec3b8229dc5f647dd448136d80976a0a33c..148dc08bf3bdd18fd3b9f5005424ca13707866d6 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -32,7 +32,7 @@ packages:
     - +root +zlib
   algorithms:
     require:
-    - '@main=master'
+    - '@git.main=master'
   cairo:
     require:
     - '@1.16.0'