diff --git a/Cross.toml b/Cross.toml
new file mode 100644
index 0000000..ac3df00
--- /dev/null
+++ b/Cross.toml
@@ -0,0 +1,15 @@
+#we build x86_64 natively, so we do not need this!
+#[target.x86_64-unknown-linux-gnu]
+#pre-build = [
+#    "apt-get update && apt-get install --assume-yes capnproto"
+#]
+
+[target.aarch64-unknown-linux-gnu]
+pre-build = [
+    "apt-get update && apt-get install --assume-yes capnproto"
+]
+
+[target.armv7-unknown-linux-gnueabihf]
+pre-build = [
+    "apt-get update && apt-get install --assume-yes capnproto"
+]