Error: (hls - 1.7.0.0 is already installed, The version 1.7.0.0 of the tool hls is not installed.)

I'm trying to install HLS 1.7.0.0 but I'm getting the following error on a NixOS system:

$ /home/brian/code/x86_64-linux-ghcup-0.1.17.7 --no-verbose install hls 1.7.0.0
[ Error ] (hls - 1.7.0.0 is already installed,
[ ...   ]  The version 1.7.0.0 of the tool hls is not installed.)
[ Error ] Also check the logs in /home/brian/.ghcup/logs

This seems like a big problem. It's already installed but not installed?

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