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-rw-r--r--var/spack/repos/builtin/packages/m4/package.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/m4/package.py b/var/spack/repos/builtin/packages/m4/package.py
index cb0091e6e1..a4599c3afc 100644
--- a/var/spack/repos/builtin/packages/m4/package.py
+++ b/var/spack/repos/builtin/packages/m4/package.py
@@ -44,6 +44,7 @@ class M4(AutotoolsPackage, GNUMirrorPackage):
variant('sigsegv', default=True,
description="Build the libsigsegv dependency")
+ depends_on('diffutils', type='build')
depends_on('libsigsegv', when='+sigsegv')
build_directory = 'spack-build'