diff --git a/build-aux/hydra/gnu-system.scm b/build-aux/hydra/gnu-system.scm
index 654f3ecf3e..b1554ced4c 100644
--- a/build-aux/hydra/gnu-system.scm
+++ b/build-aux/hydra/gnu-system.scm
@@ -43,7 +43,8 @@
 
   (and=> (assoc-ref (current-source-location) 'filename)
          (lambda (file)
-           (let ((dir (string-append (dirname file) "/../..")))
+           (let ((dir (canonicalize-path
+                       (string-append (dirname file) "/../.."))))
              (format (current-error-port) "prepending ~s to the load path~%"
                      dir)
              (set! %load-path (cons dir %load-path))))))