gedit-code-assistance fails to build. Package `gca' not found

build.log

make[1]: Entering directory '/tmp/pacaurtmp-bmonkey/gedit-code-assistance-git/src/gedit-code-assistance'
  CC       src/src_libcodeassistance_la-gca-utils-c.lo
  VALAC    src_libcodeassistance_la_vala.stamp
  VALAC    indentbackends_c_libgcaindentbackendc_la_vala.stamp
error: Package `gca' not found in specified Vala API directories or GObject-Introspection GIR directories
Compilation failed: 1 error(s), 0 warning(s)
Makefile:1187: recipe for target 'indentbackends_c_libgcaindentbackendc_la_vala.stamp' failed
make[1]: *** [indentbackends_c_libgcaindentbackendc_la_vala.stamp] Error 1
make[1]: *** Waiting for unfinished jobs....
src/gca-plugin.vala:21.1-21.33: warning: method `peas_register_types' never used
internal void peas_register_types(TypeModule module)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
src/gca-semantic-value.vala:66.2-66.33: warning: method `Gca.SemanticValue.find_child' never used
	public SemanticValue? find_child(Kind kind)
	^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
src/gca-semantic-value.vala:98.2-98.40: warning: method `Gca.SemanticValue.reference' never used
	public abstract SemanticValue reference(int idx);
	^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
src/gca-semantic-value-support.vala:8.2-8.27: warning: method `Gca.SemanticValueSupport.with_semantics' never used
	public void with_semantics(WithSemanticValueCallback callback)
	^^^^^^^^^^^^^^^^^^^^^^^^^^
src/gca-diagnostic.vala:61.3-61.27: warning: field `Gca.Diagnostic.Fixit.replacement' never used
		public string replacement;
		^^^^^^^^^^^^^^^^^^^^^^^^^
Compilation succeeded - 5 warning(s)
make[1]: Leaving directory '/tmp/pacaurtmp-bmonkey/gedit-code-assistance-git/src/gedit-code-assistance'
Makefile:547: recipe for target 'all' failed
make: *** [all] Error 2