Could not find a version that satisfies the requirement scann (from versions: none)

[siddhsql]

I am trying to build a docker image for the scann algorithm like this on a Mac:

% docker build . -f ann_benchmarks/algorithms/scann/Dockerfile -t ann-benchmarks/scann

I understand the scann library only works on Linux (why?) - that's why I am using docker for mac which spins up a linux VM. i see this in docker output:

[+] Building 1.2s (6/7)                                           docker:desktop-linux

but then i get this error:

 > [3/4] RUN pip3 install scann:
0.389 ERROR: Could not find a version that satisfies the requirement scann (from versions: none)
0.389 ERROR: No matching distribution found for scann
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Dockerfile:4
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   2 |
   3 |     RUN pip3 install --upgrade pip
   4 | >>> RUN pip3 install scann
   5 |     RUN python3 -c 'import scann'
   6 |