https://medium.com/p/af6b0f5cfa

hello-cobol-buildz.js

// compile the source code
var compile_rules = require("bldz/std/exp/rules/compile").cobol().rules;

// bind the object files
var bind_rules = require("bldz/std/exp/rules/binder").bind({
    deps: compile_rules,
    outs: ["hey-cobol"],
    syslibs: ["//CEE.SCEELKED"]
}).rules;

// run the test
genrule_usscmd({
    name: "run",
    deps: bind_rules,
    exec: "$RULE_DEPS_OUTS",
    dummy: Date.now()
});