diff --git a/build-constraints.yaml b/build-constraints.yaml
index c27739e2..df6779c2 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1587,7 +1587,7 @@ packages:
         - inline-r
         - jni
         - jvm
-        # - sparkle # build failure, requires gradle
+        - sparkle
         - th-lift
 
     "Christopher Reichert <creichert07@gmail.com> @creichert":
diff --git a/debian-bootstrap.sh b/debian-bootstrap.sh
index 52c265bb..314fde50 100755
--- a/debian-bootstrap.sh
+++ b/debian-bootstrap.sh
@@ -43,6 +43,7 @@ apt-get install -y \
     curl \
     freeglut3-dev \
     git \
+    gradle \
     libadns1-dev \
     libaio1 \
     libalut-dev \