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-rw-r--r--lib/spack/spack/package.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/spack/spack/package.py b/lib/spack/spack/package.py
index 78dfef5829..7f53b461b2 100644
--- a/lib/spack/spack/package.py
+++ b/lib/spack/spack/package.py
@@ -911,7 +911,7 @@ class Package(object):
run_tests -- Runn tests within the package's install()
"""
if not self.spec.concrete:
- raise ValueError("Can only install concrete packages.")
+ raise ValueError("Can only install concrete packages: %s." % self.spec.name)
# No installation needed if package is external
if self.spec.external: