diff --git a/_constraints b/_constraints
new file mode 100644
index 0000000..f4e17a8
--- /dev/null
+++ b/_constraints
@@ -0,0 +1,14 @@
+<constraints>
+  <overwrite>
+    <conditions>
+      <arch>aarch64</arch>
+      <arch>ppc64</arch>
+      <arch>ppc64le</arch>
+    </conditions>
+    <hardware>
+      <disk>
+        <size unit="G">6</size>
+      </disk>
+    </hardware>
+  </overwrite>
+</constraints>
diff --git a/cmake.changes b/cmake.changes
index dcb9b7d..2ec1509 100644
--- a/cmake.changes
+++ b/cmake.changes
@@ -1,3 +1,15 @@
+-------------------------------------------------------------------
+Tue Jul  9 09:18:28 UTC 2019 - Martin Liška <mliska@suse.cz>
+
+- Add _constraints file for aarch64
+  to specify a minimum build disk size
+
+-------------------------------------------------------------------
+Fri Jul  5 11:47:34 UTC 2019 - Michel Normand <normand@linux.vnet.ibm.com>
+
+- Add _constraints file for PowerPC
+  to specify a minimum build disk size
+
 -------------------------------------------------------------------
 Tue Jul  2 07:44:21 UTC 2019 - Martin Liška <mliska@suse.cz>