diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index cabd3ce..1759a58 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -9,10 +9,17 @@
 # majorite des cas (les artefacts windows/macos peuvent aussi etre produits
 # par les scripts locaux documentes dans RELEASING.md).
 #
-# Prérequis du runner : pouvoir tirer les images docker.io (rust:1.94-alpine
-# ici, ou les images messense/rust-musl-cross:x86_64-musl / :aarch64-musl) et
-# le secret GITEA_TOKEN (jeton avec droit 'write:release') positionné sur le
-# dépôt. La release existante est écrasée (release_overwrite).
+# Prérequis du runner : pouvoir tirer les images docker.io (rust:1.94-alpine,
+# ~300 Mo) et le secret GITEA_TOKEN (jeton avec droit 'write:release')
+# positionné sur le dépôt. La release existante est écrasée
+# (release_overwrite).
+#
+# Note disque (runner avec espace limite) :
+# - les builds compilent dans CARGO_TARGET_DIR=/tmp (hors du volume
+#   workspace) avec l'incremental desactive, donc rien ne persiste ;
+# - le job linux utilise cargo-zigbuild : zig (~50 Mo) fournit le linker
+#   croise pour les DEUX cibles musl statiques dans une seule image legere
+#   (rust:1.94-alpine n'embarque pas de compilateur croise aarch64).
 name: release
 
 on:
@@ -20,34 +27,41 @@ on:
     tags:
       - "v*"
 
+concurrency:
+  group: release-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   linux:
     runs-on: ubuntu-latest
     container: rust:1.94-alpine
+    env:
+      CARGO_TARGET_DIR: /tmp/am-target
+      CARGO_INCREMENTAL: "0"
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install build tools
-        run: apk add --no-cache build-base zip
+      - name: Install build tools (zig + cargo-zigbuild)
+        run: |
+          apk add --no-cache build-base zip curl
+          rustup target add x86_64-unknown-linux-musl aarch64-unknown-linux-musl
+          curl -fsSL https://ziglang.org/download/0.14.1/zig-x86_64-linux-0.14.1.tar.xz -o /tmp/zig.tar.xz
+          tar -xf /tmp/zig.tar.xz -C /opt
+          echo "/opt/zig-x86_64-linux-0.14.1" >> "$GITHUB_PATH"
+          cargo install cargo-zigbuild --locked
 
-      - name: Add musl targets
-        run: rustup target add x86_64-unknown-linux-musl aarch64-unknown-linux-musl
-
-      - name: Build linux x86_64 (static musl)
-        run: cargo build --release --locked --target x86_64-unknown-linux-musl
-
-      - name: Build linux aarch64 (static musl)
-        run: cargo build --release --locked --target aarch64-unknown-linux-musl
+      - name: Build linux x86_64 + aarch64 (static musl, zig)
+        run: cargo zigbuild --release --locked --target x86_64-unknown-linux-musl --target aarch64-unknown-linux-musl
 
       - name: Stage archives
         run: |
           mkdir -p dist
-          cp target/x86_64-unknown-linux-musl/release/am dist/am-linux-x86_64
-          cp target/aarch64-unknown-linux-musl/release/am dist/am-linux-aarch64
+          cp "$CARGO_TARGET_DIR/x86_64-unknown-linux-musl/release/am" dist/am-linux-x86_64
+          cp "$CARGO_TARGET_DIR/aarch64-unknown-linux-musl/release/am" dist/am-linux-aarch64
           cd dist
           tar -czf am-linux-x86_64.tar.gz am-linux-x86_64
           tar -czf am-linux-aarch64.tar.gz am-linux-aarch64
-          sha256sum am-*.tar.gz > checksums.txt
+          sha256sum am-linux-*.tar.gz > checksums.txt
 
       - name: Publish release
         uses: https://gitea.com/actions/gitea-release-action@v1
@@ -60,6 +74,9 @@ jobs:
 
   windows:
     runs-on: windows-latest
+    env:
+      CARGO_TARGET_DIR: C:/am-target
+      CARGO_INCREMENTAL: "0"
     steps:
       - uses: actions/checkout@v4
 
@@ -69,7 +86,7 @@ jobs:
       - name: Stage archive
         run: |
           New-Item -ItemType Directory -Force dist | Out-Null
-          Compress-Archive -Path target/release/am.exe -DestinationPath dist/am-windows-x86_64.zip -Force
+          Compress-Archive -Path C:/am-target/release/am.exe -DestinationPath dist/am-windows-x86_64.zip -Force
           (Get-FileHash dist/am-windows-x86_64.zip -Algorithm SHA256).Hash.ToLower() | Out-File dist/checksums.txt
 
       - name: Publish release
@@ -82,6 +99,9 @@ jobs:
 
   macos:
     runs-on: macos-latest
+    env:
+      CARGO_TARGET_DIR: /tmp/am-target
+      CARGO_INCREMENTAL: "0"
     steps:
       - uses: actions/checkout@v4
 
@@ -94,8 +114,8 @@ jobs:
       - name: Stage archives
         run: |
           mkdir -p dist
-          cp target/x86_64-apple-darwin/release/am dist/am-macos-x86_64
-          cp target/aarch64-apple-darwin/release/am dist/am-macos-aarch64
+          cp "$CARGO_TARGET_DIR/x86_64-apple-darwin/release/am" dist/am-macos-x86_64
+          cp "$CARGO_TARGET_DIR/aarch64-apple-darwin/release/am" dist/am-macos-aarch64
           cd dist
           tar -czf am-macos-x86_64.tar.gz am-macos-x86_64
           tar -czf am-macos-aarch64.tar.gz am-macos-aarch64