diff --git a/var/spack/repos/builtin/packages/atk/package.py b/var/spack/repos/builtin/packages/atk/package.py
index 361ea24b960..d5b6933ec3e 100644
--- a/var/spack/repos/builtin/packages/atk/package.py
+++ b/var/spack/repos/builtin/packages/atk/package.py
@@ -41,7 +41,8 @@ class Atk(Package):
 
     def url_for_version(self, version):
         """Handle atk's version-based custom URLs."""
-        return 'http://ftp.gnome.org/pub/gnome/sources/atk/%s/atk-%s.tar.xz' % (version.up_to(2), version)
+        url = 'http://ftp.gnome.org/pub/gnome/sources/atk'
+        return 'url+/%s/atk-%s.tar.xz' % (version.up_to(2), version)
 
     def install(self, spec, prefix):
         configure("--prefix=%s" % prefix)
diff --git a/var/spack/repos/builtin/packages/glib/package.py b/var/spack/repos/builtin/packages/glib/package.py
index 3450791124f..98704eaa4ce 100644
--- a/var/spack/repos/builtin/packages/glib/package.py
+++ b/var/spack/repos/builtin/packages/glib/package.py
@@ -49,7 +49,8 @@ class Glib(Package):
 
     def url_for_version(self, version):
         """Handle glib's version-based custom URLs."""
-        return 'http://ftp.gnome.org/pub/gnome/sources/glib/%s/glib-%s.tar.xz' % (version.up_to(2), version)
+        url = 'http://ftp.gnome.org/pub/gnome/sources/glib'
+        return url+'/%s/glib-%s.tar.xz' % (version.up_to(2), version)
 
     def install(self, spec, prefix):
         configure("--prefix=%s" % prefix)