diff --git a/spack.yaml b/spack.yaml
new file mode 100644
index 0000000..884883c
--- /dev/null
+++ b/spack.yaml
@@ -0,0 +1,11 @@
+spack:
+  specs:
+  - autoconf
+  - m4
+  - automake
+  - libtool
+  - pkg-config
+  - mochi-margo
+  - mpich
+  concretizer:
+    unify: true