The package installs successfully stating that the Blas dependency is fulfilled, but when attempting to do a scalar product between vectors I get:
"could not load: blas.dll"
What nimble is telling you about the BLAS dependency being satisfied is that the dependency on the Nim BLAS wrapper is met. However, the Nim wrapper loads the shared library for BLAS at runtime. That library has to be available in your PATH and needs to be installed manually by the user.
Not sure how to set up BLAS on Windows though. Really depends on what you use to run Nim code (cmd/powershell, cygwin etc.).