diff --git a/guix-data-service/model/build.scm b/guix-data-service/model/build.scm
index 1240453..86eac9d 100644
--- a/guix-data-service/model/build.scm
+++ b/guix-data-service/model/build.scm
@@ -136,12 +136,14 @@ WHERE builds.id = $1"
          (exec-query
           conn
           "
+WITH derivation_output_details_ids (id) AS (
+  SELECT unnest(derivation_output_details_ids) AS id
+  FROM derivation_output_details_sets
+  WHERE derivation_output_details_sets.id = $1
+)
 SELECT derivation_output_details.path
 FROM derivation_output_details
-INNER JOIN derivation_output_details_sets
-  ON ARRAY[derivation_output_details.id] &&
-       derivation_output_details_sets.derivation_output_details_ids
-WHERE derivation_output_details_sets.id = $1"
+WHERE derivation_output_details.id IN (SELECT id FROM derivation_output_details_ids)"
           (list output-details-set-id))
          (exec-query
           conn