github.com/lightstep/otel-launcher-go/lightstep/instrumentation import fails for undefined variables

[MattDynamite]

Describe the bug
Can't build my project when importing otel-launcher-go
I get the following error:
go\pkg\mod\github.com\lightstep\otel-launcher-go\lightstep\[email protected]\cputime\cputime_other.go:58:2: undefined: gcSeconds

To Reproduce
Add github.com/lightstep/otel-launcher-go/lightstep/instrumentation to your go.mod file on a non-linux machine (windows in my case).
The error is that undefined: memStats & undefined: gcSeconds variables are not defined anywhere.
I'm not sure how it compiles anywhere else (Maybe there's something wrong with my project?)

Expected behavior
Import the package and it will work.

Additional context
Also when running go linter I get:
Running error: can't run linter goanalysis_metalinter\nbuildir: failed to load package cputime: could not load export data: no export data for \"github.com/lightstep/otel-launcher-go/lightstep/instrumentation/cputime