diff --git a/_constraints b/_constraints
new file mode 100644
index 0000000..ff5e64a
--- /dev/null
+++ b/_constraints
@@ -0,0 +1,17 @@
+<constraints>
+  <hardware>
+    <physicalmemory>
+      <size unit="G">4</size>
+    </physicalmemory>
+  </hardware>
+  <overwrite>
+    <conditions>
+      <arch>riscv64</arch>
+    </conditions>
+    <hardware>
+      <physicalmemory>
+        <size unit="G">8</size>
+      </physicalmemory>
+    </hardware>
+  </overwrite>
+</constraints>
diff --git a/ghc-bootstrap-helpers.changes b/ghc-bootstrap-helpers.changes
index 071580e..cf2d938 100644
--- a/ghc-bootstrap-helpers.changes
+++ b/ghc-bootstrap-helpers.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Jun  2 08:11:28 UTC 2020 - Ondřej Súkup <mimi.vx@gmail.com>
+
+- add constraints for memory on riscv64 
+
 -------------------------------------------------------------------
 Sat Jan 18 09:08:42 UTC 2020 - Peter Trommler <ptrommler@icloud.com>