/usr/share/perl5/MouseX/ is in libmousex-nativetraits-perl 1.09-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/MouseX/NativeTraits/
/usr/share/perl5/MouseX/NativeTraits.pm
/usr/share/perl5/MouseX/NativeTraits/ArrayRef.pm
/usr/share/perl5/MouseX/NativeTraits/Bool.pm
/usr/share/perl5/MouseX/NativeTraits/CodeRef.pm
/usr/share/perl5/MouseX/NativeTraits/Counter.pm
/usr/share/perl5/MouseX/NativeTraits/HashRef.pm
/usr/share/perl5/MouseX/NativeTraits/MethodProvider/
/usr/share/perl5/MouseX/NativeTraits/MethodProvider.pm
/usr/share/perl5/MouseX/NativeTraits/MethodProvider/ArrayRef.pm
/usr/share/perl5/MouseX/NativeTraits/MethodProvider/Bool.pm
/usr/share/perl5/MouseX/NativeTraits/MethodProvider/CodeRef.pm
/usr/share/perl5/MouseX/NativeTraits/MethodProvider/Counter.pm
/usr/share/perl5/MouseX/NativeTraits/MethodProvider/HashRef.pm
/usr/share/perl5/MouseX/NativeTraits/MethodProvider/Num.pm
/usr/share/perl5/MouseX/NativeTraits/MethodProvider/Str.pm
/usr/share/perl5/MouseX/NativeTraits/Num.pm
/usr/share/perl5/MouseX/NativeTraits/Str.pm