On 1/6/20 1:45 PM, Phil Thompson wrote:
> On 06/01/2020 12:41, s.achterop at rug.nl wrote:
> My guess would be your version of pip is too old.
I just installed pip 19.3.1 and all is well.
Thanks,
Sietse
PS. Note that even Debian/unstable still has pip 18.1.