diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 33512be..5d52c31 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,6 +10,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5
+      # Les images du runner Gitea n'embarquent pas rustup.
+      - run: |
+          command -v rustup || {
+            curl -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal --default-toolchain none
+            echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"
+          }
       - run: rustup toolchain install
       - uses: Swatinem/rust-cache@v2
       - run: cargo fmt --all --check