Build including mecha fails with no field named 'root_source_file' in struct 'Build.CreateModuleOptions'

[jdrempel]

Zig version: 0.11.0 OS: Pop!_OS 22.04 LTS

Hello! I am trying to include mecha in my project and when running zig build I get the error in the issue title:

/home/jeremy/.cache/zig/p/12203ee851cb0451f3ebdf23b51cf21886e261a563b5b1e1ec16c801dc3ef9ecea5d/build.zig:8:45: error: no field named 'root_source_file' in struct 'Build.CreateModuleOptions'
    const module = b.addModule("mecha", .{ .root_source_file = .{ .path = "mecha.zig" } });
                                            ^~~~~~~~~~~~~~~~
/usr/local/lib/zig/std/Build.zig:680:33: note: struct declared here
pub const CreateModuleOptions = struct {
                                ^~~~~~
referenced by:
    runBuild__anon_47132: /usr/local/lib/zig/std/Build.zig:1638:27
    remaining reference traces hidden; use '-freference-trace' to see all reference traces

I am fetching mecha through the built-in package manager - here's the relevant excerpt from build.zig.zon:

    .dependencies = .{
        .mecha = .{
            .url = "https://github.com/Hejsil/mecha/archive/5d572b31b08268e977bd52ba6701dfea6bf08025.tar.gz",
            .hash = "12203ee851cb0451f3ebdf23b51cf21886e261a563b5b1e1ec16c801dc3ef9ecea5d",
        },
    },

And a snippet from my build.zig:

    const exe = b.addExecutable(.{
        .name = "openmunge",
        .root_source_file = .{ .path = "src/main.zig" },
        .target = target,
        .optimize = optimize,
    });
    exe.addModule("mecha", mecha.module("mecha"));
    b.installArtifact(exe);

Any idea whether this is something I'm doing wrong? Thanks in advance.

[Hejsil]

The master branch of mecha targets zig master. There is no guarantee that older version of zig can compiler master. Use on of the mecha releases if you need a version that compilers with at specific version of zig

[jdrempel]

Ah I see, I wrongly assumed master targeted the latest stable zig release. Thanks for the info. :)