Have you set up the PATH environment variable properly such that the gmake tool can be found?

In a command prompt, type gmake to check whether the tool can be found.

If it is not found, you will need to set up the PATH environment variable to also add the path to the gmake tool that is distributed with Strawberry Perl. Most likely, something like this will fix it for the current session:

path C:\Strawb~1\c\bin;%PATH%
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