diff --git a/guix-data-service/jobs/load-new-guix-revision.scm b/guix-data-service/jobs/load-new-guix-revision.scm
index fbced1d..e499a8b 100644
--- a/guix-data-service/jobs/load-new-guix-revision.scm
+++ b/guix-data-service/jobs/load-new-guix-revision.scm
@@ -731,17 +731,30 @@ WHERE job_id = $1")
              (round
               (/ (assoc-ref (gc-stats) 'heap-size)
                  (expt 2. 20))))
-     (with-time-logging
-         (simple-format #f "getting derivations for ~A" system-target-pair)
-       (catch
-         'match-error
-         (lambda ()
-           (inferior-eval '(invalidate-derivation-caches!) inf))
-         (lambda (key . args)
-           (simple-format
-            (current-error-port)
-            "warning: ignoring match-error from calling inferior invalidate-derivation-caches!\n")))
-       (inferior-eval-with-store inf store (proc packages (list system-target-pair)))))
+
+     (format (current-error-port)
+             "inferior heap size: ~a MiB~%"
+             (round
+              (/ (inferior-eval '(assoc-ref (gc-stats) 'heap-size) inf)
+                 (expt 2. 20))))
+
+     (let ((derivations
+            (with-time-logging
+                (simple-format #f "getting derivations for ~A" system-target-pair)
+              (catch
+                'match-error
+                (lambda ()
+                  (inferior-eval '(invalidate-derivation-caches!) inf))
+                (lambda (key . args)
+                  (simple-format
+                   (current-error-port)
+                   "warning: ignoring match-error from calling inferior invalidate-derivation-caches!\n")))
+              (inferior-eval-with-store inf store (proc packages (list system-target-pair))))))
+
+       ;; Clean the cached store connections, as there are caches associated
+       ;; with these that take up lots of memory
+       (inferior-eval '(when (defined? '%store-table) (hash-clear! %store-table)) inf)
+       derivations))
    (append supported-system-pairs
            supported-system-cross-build-pairs)))