diff --git a/.semaphore/semaphore.yml b/.semaphore/semaphore.yml
index 7e59fbe4..8af67b13 100644
--- a/.semaphore/semaphore.yml
+++ b/.semaphore/semaphore.yml
@@ -26,6 +26,16 @@ blocks:
             - sem-version java 17
             - nvm install 21
             - sudo apt-get install -y zopfli brotli
+            - which java
+            - java --version
+            - which node
+            - node --version
+            - ./scripts/install-asdf.sh
+            - which java
+            - java --version
+            - which node
+            - node --version
+            - asdf current
 
             - ./scripts/build.sh
 
diff --git a/scripts/install-asdf.sh b/scripts/install-asdf.sh
new file mode 100755
index 00000000..1c7cd171
--- /dev/null
+++ b/scripts/install-asdf.sh
@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -euxo pipefail
+
+if [ -d ~/.asdf ]; then
+  exit 0
+fi
+
+git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v0.14.1
+#echo '. "$HOME/.asdf/asdf.sh"' >> ~/.bashrc
+. "$HOME/.asdf/asdf.sh"
+asdf plugin add java
+asdf plugin add nodejs
+asdf install