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-rw-r--r--lib/spack/spack/graph.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/spack/spack/graph.py b/lib/spack/spack/graph.py
index f474799275..9753741c61 100644
--- a/lib/spack/spack/graph.py
+++ b/lib/spack/spack/graph.py
@@ -522,7 +522,7 @@ def graph_dot(specs, deptype=None, static=False, out=None):
out.write('digraph G {\n')
out.write(' labelloc = "b"\n')
- out.write(' rankdir = "LR"\n')
+ out.write(' rankdir = "TB"\n')
out.write(' ranksep = "5"\n')
out.write('node[\n')
out.write(' fontname=Monaco,\n')