diff --git a/var/spack/repos/builtin/packages/py-fastcluster/package.py b/var/spack/repos/builtin/packages/py-fastcluster/package.py
new file mode 100644
index 0000000000..bc09681527
--- /dev/null
+++ b/var/spack/repos/builtin/packages/py-fastcluster/package.py
@@ -0,0 +1,18 @@
+# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class PyFastcluster(PythonPackage):
+    """Fast hierarchical clustering routines for R and Python."""
+
+    homepage = "http://danifold.net/"
+    url      = "https://pypi.io/packages/source/f/fastcluster/fastcluster-1.1.26.tar.gz"
+
+    version('1.1.26', sha256='a202f44a3b06f5cf9cdba3c67d6c523288922d6e6a1cdf737292f93759aa82f7')
+
+    depends_on('py-setuptools', type='build')
+    depends_on('py-numpy@1.9:', type=('build', 'run'))