diff --git a/ci.hocon b/ci.hocon
index 701560ea0..28293d903 100644
--- a/ci.hocon
+++ b/ci.hocon
@@ -121,6 +121,9 @@ ruby-downstream-test: {
 }
 
 svm-downstream-test: ${requireGCC} {
+  packages: {
+      rustc: "==1.19.0"
+  }
   environment: {
     SVM_REPO: "https://github.com/graalvm/graal.git",
     SVM_SUITEDIR: substratevm,