diff --git a/var/spack/repos/builtin/packages/py-backports-functools-lru-cache/package.py b/var/spack/repos/builtin/packages/py-backports-functools-lru-cache/package.py
index 444365115e..48e4764e5f 100644
--- a/var/spack/repos/builtin/packages/py-backports-functools-lru-cache/package.py
+++ b/var/spack/repos/builtin/packages/py-backports-functools-lru-cache/package.py
@@ -31,7 +31,8 @@ class PyBackportsFunctoolsLruCache(PythonPackage):
     homepage = "https://github.com/jaraco/backports.functools_lru_cache"
     url = "https://pypi.io/packages/source/b/backports.functools_lru_cache/backports.functools_lru_cache-1.4.tar.gz"
 
-    version('1.4', 'b954e7d5e2ca0f0f66ad2ed12ba800e5')
+    version('1.4', 'b954e7d5e2ca0f0f66ad2ed12ba800e5',
+            url="https://pypi.io/packages/source/b/backports.functools_lru_cache/backports.functools_lru_cache-1.4.tar.gz")
     version('1.0.1', 'c789ef439d189330b99872746a6d9e85',
             url="https://pypi.io/packages/source/b/backports.functools_lru_cache/backports.functools_lru_cache-1.0.1.zip")
     depends_on('py-setuptools', type='build')