diff --git a/.github/workflows/build-docs.yml b/.github/workflows/build-docs.yml
index fb12975..ba801c3 100644
--- a/.github/workflows/build-docs.yml
+++ b/.github/workflows/build-docs.yml
@@ -27,7 +27,7 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update -qq
-          sudo apt-get install -y pandoc python3-yaml
+          sudo apt-get install -y pandoc python3-yaml fish
 
       - name: Generate concatenated markdown
         run: python3 docs/build-manual.py --concat -o docs/fish-config.md