try this

Author: ChrisDenton

src/ci/scripts/install-mingw.sh

@@ -39,10 +39,7 @@ if isWindows; then
     esac
 
     if [[ "${CUSTOM_MINGW:-0}" == 0 ]]; then
-        pacman -S --noconfirm --needed mingw-w64-$arch-toolchain mingw-w64-$arch-cmake \
-            mingw-w64-$arch-gcc \
-            mingw-w64-$arch-python # the python package is actually for python3
-        ciCommandAddPath "$(ciCheckoutPath)/msys2/mingw${bits}/bin"
+        pacman -S --noconfirm --needed mingw-w64-$arch-toolchain
     else
         mingw_dir="mingw${bits}"