why openmosix doesnt improve compiling?

why openmosix doesnt improve compiling?
is this normal?
when i type make, the process is only at the computer executed, it does not migrate to other nodes, i already tried a simple test script and run to see if load balancing really works, and it worked because i saw it on openmosixview, but when i compile mozilla, it does not migrate, why? it is possible to improve the compile time of programs using openmosix? help.

PIDs change rapidly so it decides not to farm them out. run mtop while compiling for further details. let me know if you develop a solution to this.

is there a way to improve the compiling time with openmosix?

umm use "pmake" I think....