wiredep and angular-recaptcha unknown provider

[AmirGilboa]

• [x] I understand that GitHub issues are not for tech support, but for questions specific to this generator, bug reports, and feature requests.

Item	Version
generator-angular-fullstack	3.7.?
Node	6.10.2
npm	3.9.x
Operating System Windows 10

Item	Answer
Transpiler	Babel
Markup	HTML
CSS	SCSS
Router	ui-router
DB	MongoDB
Auth	Y

this is more of SO question, but no answer there: https://stackoverflow.com/questions/44296992/wiredep-and-angular-recaptcha-unknown-provider

so it's a component that should work with angular 1.x, very widely used: angular-recaptcha. installed by bower, everything looks right. works in dev, but not after build. the app/vendor.c6b1294e.js file contains the library, that means wiredep did the job correctly. still i get an error: Unknown provider: vcRecaptchaServiceProvider <- vcRecaptchaService <- ContactCtrl

any idea what to look for? thanks.