I think I can reproduce the issue. For a reason I haven't found yet, an installed parrot's pbc_to_exe runs the following.
mt.exe -nologo -manifest perl6.exe.manifest -outputresource:perl6.exe.manifest;1 The correct command would be as follows. mt.exe -nologo -manifest perl6.exe.manifest -outputresource:perl6.exe;1 pbc_to_exe in the build directory does the right thing, the installed pbc_to_exe does not. Ron