procedure entry point EVP_DigestSign could not be located

[89z]

Using this file:

package main
import "github.com/libgit2/git2go/v31"

func main() {
   git.Clone("git://github.com/libgit2/git2go", "git2go", nil)
}

If I compile like this:

go build -tags static,system_libgit2

I get this result:

The procedure entry point EVP_DigestSign could not be located in the dynamic
link library C:\msys2\mingw64\bin\libssh2-1.dll. 

This is strange because I have the static library installed:

https://packages.msys2.org/package/mingw-w64-x86_64-libssh2

and I passed the static flag above.