Try to be more specific about numpy version.

Author: rcurtin

build_mlpack.bat

@@ -2,8 +2,9 @@ rem Build mlpack's Python bindings on a Windows system.
 
 pip install cython delvewheel wheel setuptools
 rem Pandas 2.1.0 and newer aren't supported on Win32 anymore, so we use an old
-rem version.  We also need to use numpy 1.x.
-if "%WIN_ARCH%" == "Win32" pip install "numpy<2" "pandas==%PANDAS_VER%"
+rem version.  We also need to use numpy 1.x, but not too new because that will
+rem require a version of gcc that we won't have.
+if "%WIN_ARCH%" == "Win32" pip install "numpy==1.26.0" "pandas==%PANDAS_VER%"
 if not "%WIN_ARCH%" == "Win32" pip install numpy pandas
 
 python -c "import pandas; print(pandas.__version__)"