diff --git a/modules/drupal/manifests/distbuild.pp b/modules/drupal/manifests/distbuild.pp
index 3178d3b673..66ee441a2b 100644
--- a/modules/drupal/manifests/distbuild.pp
+++ b/modules/drupal/manifests/distbuild.pp
@@ -53,15 +53,15 @@ define drupal::distbuild (
     timeout   => 900,
     cwd       => "${site_sandbox_root}/${$site_build_repo_name}",
     command   => "rm -rf ${site_staging_root}/${site_staging_tarball} && drush make --tar ${site_makefile} ${site_staging_root}/${site_staging_tarball}",
-    unless    => "diff ${site_sandbox_root}/${$site_build_repo_name}/.git/packed-refs ${site_build_flagfile}",
+    unless    => "diff ${site_sandbox_root}/${$site_build_repo_name}/.git/refs/heads/master ${site_build_flagfile}",
     require   => File[$site_staging_root],
     subscribe => Vcsrepo["${site_sandbox_root}/${$site_build_repo_name}"],
   }
 
   exec { 'drupal-build-dist-post':
     path      => '/usr/bin:/bin',
-    command   => "cp ${site_sandbox_root}/${$site_build_repo_name}/.git/packed-refs ${site_build_flagfile} && rm -rf ${site_deploy_flagfile}",
-    unless    => "diff ${site_sandbox_root}/${$site_build_repo_name}/.git/packed-refs ${site_build_flagfile}",
+    command   => "cp ${site_sandbox_root}/${$site_build_repo_name}/.git/refs/heads/master ${site_build_flagfile} && rm -rf ${site_deploy_flagfile}",
+    unless    => "diff ${site_sandbox_root}/${$site_build_repo_name}/.git/refs/heads/master ${site_build_flagfile}",
     subscribe => Vcsrepo["${site_sandbox_root}/${$site_build_repo_name}"],
     require   => Exec['drupal-build-dist'],
   }