Closed issue by hervyqa on void-packages repository

https://github.com/void-linux/void-packages/issues/42699

Description:
https://github.com/void-linux/void-packages/blob/master/Manual.md#mandatory-variables

> `version` A string with the package version. Must not contain dashes or underscore and at least one digit is required. Shell's variable substitution usage is not allowed.

i have a problem changing the version of package `R-cran-colorspace` which contains dashes. how to fix it?

https://cran.r-project.org/src/contrib/colorspace_2.1-0.tar.gz

`version=2.1-0`

output result:
```
=> ERROR: version contains invalid character: -
```