diff --git a/build_util/modify_pyinstaller.bash b/build_util/modify_pyinstaller.bash
index 8d26db7f0..a38e1656f 100755
--- a/build_util/modify_pyinstaller.bash
+++ b/build_util/modify_pyinstaller.bash
@@ -21,5 +21,5 @@ __declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
 __declspec(dllexport) DWORD AmdPowerXpressRequestHighPerformance = 0x00000001;
 #endif
 EOF
-(cd "$tempdir/bootloader" && python ./waf all --target-arch="64bit")
+(cd "$tempdir/bootloader" && python ./waf all --msvc_targets="x64")
 pip install -U "$tempdir"