Activate powershell specifically for Windows

global.conf

@@ -3,4 +3,3 @@ core:default_build_profile = cura_build.jinja
 tools.cmake.cmaketoolchain:generator = Ninja
 tools.gnu:define_libcxx11_abi = True
 core.version_ranges:resolve_prereleases=True
-tools.env.virtualenv:powershell=True

profiles/cura.jinja

@@ -10,6 +10,9 @@ scripta*:compiler.cppstd=20
 umspatial*:compiler.cppstd=20
 dulcificum*:compiler.cppstd=20
 cura_settings*:compiler.cppstd=20
+{% if platform.system() == 'Windows' %}
+tools.env.virtualenv:powershell=True
+{% endif %}
 
 [options]
 asio-grpc/*:local_allocator=recycling_allocator