npm run build fails

[gridworkz]

Running npm run build results in many:
....
node_modules/@types/babel__traverse/index.d.ts:1122:58 - error TS1109: Expression expected.

1122 assertVoidTypeAnnotation(props?: object | null): void;
~

node_modules/@types/babel__traverse/index.d.ts:1123:23 - error TS1109: Expression expected.

1123 assertWhile(props?: object | null): void;
~

node_modules/@types/babel__traverse/index.d.ts:1123:39 - error TS1005: ';' expected.

1123 assertWhile(props?: object | null): void;
~

node_modules/@types/babel__traverse/index.d.ts:1123:45 - error TS1109: Expression expected.

1123 assertWhile(props?: object | null): void;
~

node_modules/@types/babel__traverse/index.d.ts:1124:32 - error TS1109: Expression expected.

1124 assertWhileStatement(props?: object | null): void;
....

Tried installing: npm install typeorm-seeding@1.0.0-beta.6 --save

UPDATE: deleted node_modules and re-ran npm install && npm update and installed: typeorm-seeding@1.0.0-beta.6. Then I did an installation per the docs and everything worked. The usual node voodoo :)