diff --git a/.github/workflows/linux-build.yml b/.github/workflows/linux-build.yml
index fc43686..da4ff37 100644
--- a/.github/workflows/linux-build.yml
+++ b/.github/workflows/linux-build.yml
@@ -14,8 +14,13 @@ jobs:
       run: |
         sudo add-apt-repository universe
         sudo apt-get update
-        sudo apt-get install -y --no-install-recommends libsdl1.2-dev libgtk2.0-dev libz80ex-dev libxmu-dev
-    - uses: actions/checkout@v3
+        sudo apt-get install -y --no-install-recommends \
+          libsdl1.2-dev \
+          libgtk2.0-dev \
+          libz80ex-dev \
+          libxmu-dev \
+          netpbm
+    - uses: actions/checkout@v4
     - name: bootstrap
       run: ./config/bootstrap
     - name: configure