xfce-mcs-manager won't compile

[Landy Roman]

i get this error

devchecking for libxfce4util-1.0 >= 0.0... Package libxfce4util-1.0 was not
found in the pkg
-config search path.
Perhaps you should add the directory containing `libxfce4util-1.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libxfce4util-1.0' found

configure: error: Library requirements (libxfce4util-1.0 >= 0.0) not met;
consider adjust
ing the PKG_CONFIG_PATH environment variable if your libraries are in a
nonstandard prefi
x so pkg-config can find them.
make: *** No targets specified and no makefile found.  Stop.
landie at pepino:~/xfce-devel/xfce-mcs-manager >