CDN generates empty module mappings that turn out to be incorrect

[merryman]

I can reproduce this with the latest version of mocha 11.7.4 but any version since 10.3 appears to have this issue.
JSPM generates an import map for mocha that has several empty mappings:

...
"#lib/nodejs/esm-utils.js": "https://ga.jspm.io/npm:@jspm/core@2.1.0/nodelibs/@empty.js",
"#lib/nodejs/file-unloader.js": "https://ga.jspm.io/npm:@jspm/core@2.1.0/nodelibs/@empty.js",
"#lib/nodejs/parallel-buffered-runner.js": "https://ga.jspm.io/npm:@jspm/core@2.1.0/nodelibs/@empty.js",
...

However in the actual modules that import these mappings, certain function exports are being assumed that are not present.
One example: https://ga.jspm.io/npm:mocha@11.7.4/_/C9_7g5Z2.js, where #lib/nodejs/esm-utils.js is assumed to export a dew member that is not present in the module.