[Vala] error while make. vala-1.0 not found

[blue hut <g bluehut googlemail com>]

Hello,
I tried to install valencia and got an error while make. I am using Ubuntu
10.10 and i think i installed all dependencies.
This is what i get after typing "make":

Package vala-1.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `vala-1.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'vala-1.0' found
make: *** [libvalencia.so] Fehler 1

Thank you for take some time and read this.

bluehut