diff --git a/.github/workflows/test-chroot.yml b/.github/workflows/test-chroot.yml
index 2f5457f52..b3ea6e4d9 100644
--- a/.github/workflows/test-chroot.yml
+++ b/.github/workflows/test-chroot.yml
@@ -157,6 +157,8 @@ jobs:
 
       - name: Setup Rust
         uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: stable
 
       - name: Setup Java
         uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v4
@@ -186,6 +188,12 @@ jobs:
             echo "Captured CARGO_HOME: ${CARGO_HOME}"
           fi
 
+          # Rust: RUSTUP_HOME is needed so rustc can find the toolchain
+          if [ -n "$RUSTUP_HOME" ]; then
+            echo "RUSTUP_HOME=${RUSTUP_HOME}" >> $GITHUB_ENV
+            echo "Captured RUSTUP_HOME: ${RUSTUP_HOME}"
+          fi
+
           # Java: JAVA_HOME is needed so entrypoint can add $JAVA_HOME/bin to PATH
           # The setup-java action sets JAVA_HOME but sudo may not preserve it
           if [ -n "$JAVA_HOME" ]; then
@@ -210,11 +218,14 @@ jobs:
           echo "GOROOT: $GOROOT"
           echo "Ruby: $(ruby --version)"
           echo "Gem: $(gem --version)"
+          echo "Bundler: $(bundle --version 2>&1 || echo 'Not installed')"
           echo "Rust: $(rustc --version)"
           echo "Cargo: $(cargo --version)"
           echo "CARGO_HOME: $CARGO_HOME"
+          echo "RUSTUP_HOME: $RUSTUP_HOME"
           echo "Java: $(java --version 2>&1 | head -1)"
           echo "JAVA_HOME: $JAVA_HOME"
+          echo "Maven: $(mvn --version 2>&1 | head -1 || echo 'Not installed')"
           echo "dotnet: $(dotnet --version 2>&1)"
           echo "DOTNET_ROOT: $DOTNET_ROOT"
 
diff --git a/containers/agent/entrypoint.sh b/containers/agent/entrypoint.sh
index f2f741d07..eced7d04e 100644
--- a/containers/agent/entrypoint.sh
+++ b/containers/agent/entrypoint.sh
@@ -292,6 +292,11 @@ AWFEOF
       echo "[entrypoint] Adding CARGO_HOME/bin to PATH: ${AWF_CARGO_HOME}/bin"
       echo "export PATH=\"${AWF_CARGO_HOME}/bin:\$PATH\"" >> "/host${SCRIPT_FILE}"
       echo "export CARGO_HOME=\"${AWF_CARGO_HOME}\"" >> "/host${SCRIPT_FILE}"
+      # Also set RUSTUP_HOME if provided (needed for rustc to find toolchain)
+      if [ -n "${AWF_RUSTUP_HOME}" ]; then
+        echo "[entrypoint] Setting RUSTUP_HOME: ${AWF_RUSTUP_HOME}"
+        echo "export RUSTUP_HOME=\"${AWF_RUSTUP_HOME}\"" >> "/host${SCRIPT_FILE}"
+      fi
     else
       # Fallback: detect Cargo from default location if CARGO_HOME not provided
       # This ensures Rust binaries work even when CARGO_HOME env var is not set
diff --git a/src/docker-manager.ts b/src/docker-manager.ts
index bdd047177..e32023a92 100644
--- a/src/docker-manager.ts
+++ b/src/docker-manager.ts
@@ -358,6 +358,10 @@ export function generateDockerCompose(
   if (process.env.CARGO_HOME) {
     environment.AWF_CARGO_HOME = process.env.CARGO_HOME;
   }
+  // Rust: Pass RUSTUP_HOME so rustc/cargo can find the toolchain
+  if (process.env.RUSTUP_HOME) {
+    environment.AWF_RUSTUP_HOME = process.env.RUSTUP_HOME;
+  }
   // Java: Pass JAVA_HOME so entrypoint can add $JAVA_HOME/bin to PATH and set JAVA_HOME
   if (process.env.JAVA_HOME) {
     environment.AWF_JAVA_HOME = process.env.JAVA_HOME;