nimble.eclass: force ninja

Signed-off-by: Anna (cybertailor) Vyalkova <cyber+gentoo@sysrq.in>

eclass/nimble.eclass

@@ -51,6 +51,12 @@ if [[ ! ${_NIMBLE_ECLASS} ]]; then
 # Build directory, location where all generated files should be placed.
 # If this isn't set, it defaults to ${WORKDIR}/${P}-build.
 
+# @ECLASS_VARIABLE: NINJA
+# @INTERNAL
+# @DESCRIPTION:
+# Force ninja because samu doesn't work correctly.
+NINJA="ninja"
+
 inherit edo nim-utils ninja-utils
 
 BDEPEND="${NINJA_DEPEND}