diff --git a/guix-data-service/model/package.scm b/guix-data-service/model/package.scm
index 6f7d204..813d820 100644
--- a/guix-data-service/model/package.scm
+++ b/guix-data-service/model/package.scm
@@ -579,7 +579,7 @@ INNER JOIN package_derivations
   ON package_derivations.id = guix_revision_package_derivations.package_derivation_id
  AND package_derivations.target = $3
 INNER JOIN systems
-  ON package_derivations.system_id = systems_id
+  ON package_derivations.system_id = systems.id
  AND systems.system = $2
 INNER JOIN packages
   ON package_derivations.package_id = packages.id