Ampersand sign (&) in URL.

[Dmitry Nikolaev]

Hello. I've tried to package PT Astra font

http://astralinux.com/fonts.html

But it's download URL contains ampersand sign (&).

http://astralinux.com/images/fonts/PTAstraSans&Serif_TTF_ver1001.zip

Guix returns

build failed: invalid character `&' in name
`PTAstraSans&Seif_TTF_ver1001.zip.drv'

How do I escape & in URL so guix accept it?

Dmitry Nikolaev