`readlink: missing operand` error on install

[silopolis]

Hi,

I'm getting the following on install:

$ xxh +vv +I xxh-plugin-prerun-dotfiles
Install xxh-plugin-prerun-dotfiles to local /home/tarax/.xxh/.xxh/plugins/xxh-plugin-prerun-dotfiles
Git clone https://github.com/xxh/xxh-plugin-prerun-dotfiles
RUN SHELL COMMAND CAPTURED: git clone  --depth 1 https://github.com/xxh/xxh-plugin-prerun-dotfiles /home/tarax/.xxh/.xxh/plugins/xxh-plugin-prerun-dotfiles 1>&2
Build xxh-plugin-prerun-dotfiles
RUN SHELL COMMAND: /home/tarax/.xxh/.xxh/plugins/xxh-plugin-prerun-dotfiles/build.sh  -K 'linux' -A 'x86_64' 1>&2
readlink: missing operand
Try 'readlink --help' for more information.
Installed /home/tarax/.xxh/.xxh/plugins/xxh-plugin-prerun-dotfiles

OTOH

$ ack readlink /home/tarax/.xxh/.xxh/plugins/xxh-plugin-prerun-dotfiles
/home/tarax/.xxh/.xxh/plugins/xxh-plugin-prerun-dotfiles/build.sh
29:  pypath=`readlink -f $(which python)`
$ 
$ readlink -f $(which python)
/home/tarax/python
/home/tarax/not
/home/tarax/found

xxh was installed using pipx