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-rw-r--r--var/spack/repos/builtin/packages/libpng/package.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/libpng/package.py b/var/spack/repos/builtin/packages/libpng/package.py
index e02b08663e..73c8c62341 100644
--- a/var/spack/repos/builtin/packages/libpng/package.py
+++ b/var/spack/repos/builtin/packages/libpng/package.py
@@ -9,6 +9,8 @@ class Libpng(Package):
version('1.6.15', '829a256f3de9307731d4f52dc071916d')
version('1.6.14', '2101b3de1d5f348925990f9aa8405660')
+ depends_on('zlib')
+
def install(self, spec, prefix):
configure("--prefix=%s" % prefix)
make()