Zig build emits error

Help
1 
$ /opt/zig-0.12/zig build
/home/x/2-coding/zig-lang/xjiss/build.zig:3:21:
error: root struct of file 'std' has no member named 'build'
pub fn build(b: *std.build.Builder) void {
                 ~~~^~~~~~
/opt/zig-0.12/lib/std/std.zig:1:1: note: struct declared here
pub const ArrayHashMap = array_hash_map.ArrayHashMap;
^~~
referenced by:
    runBuild__anon_8991: /opt/zig-0.12/lib/std/Build.zig:2078:50
    main: /opt/zig-0.12/lib/compiler/build_runner.zig:300:29

Did I miss something?

$ /opt/zig-0.11/zig build successfully produces working executable.

2

std.build.Builder became std.Build

example:

pub fn build(b: *std.Build) void {
    ...
}
3

thanx!

-pub fn build(b: *std.build.Builder) void {
+pub fn build(b: *std.Build) void {