Zig

Railpack builds and deploys Zig applications.

Detection

Your project will be detected as a Zig application if a build.zig file exists in the root directory.

Versions

Zig defaults to the latest version. This can be overridden with any mise-supported version file (mise.toml, .tool-versions, etc) or the RAILPACK_PACKAGES environment variable.

Configuration

Railpack builds your application with zig build --release=safe. Only zig-out/bin is copied into the final container, so the source tree and the build cache are not shipped.

The start command is ./zig-out/bin/<name>. <name> is the .name field in build.zig.zon, or the application directory name when that file is absent. Override it with RAILPACK_START_CMD:

RAILPACK_START_CMD="./zig-out/bin/zig_example"