pixi: Try to fix Windows install prefix

Author: jorisv

pixi.toml

@@ -31,8 +31,14 @@ backend = { name = "pixi-build-cmake", version = "0.3.*" }
 
 [package.build.config]
 extra-args = [
-  # Don't use standard layout because it's not well implemented on Windows
-  "-DPYTHON_STANDARD_LAYOUT=OFF",
+  "-DGENERATE_PYTHON_STUBS=ON",
+  "-DBUILD_TESTING=OFF",
+  "-DBUILD_TESTING_SCIPY=OFF",
+]
+
+[package.build.config.target.win-64]
+extra-args = [
+  "-DPYTHON_SITELIB=%PREFIX%/Lib/site-packages",
   "-DGENERATE_PYTHON_STUBS=ON",
   "-DBUILD_TESTING=OFF",
   "-DBUILD_TESTING_SCIPY=OFF",