Index: Mk/bsd.gecko.mk
===================================================================
--- Mk/bsd.gecko.mk
+++ Mk/bsd.gecko.mk
@@ -152,6 +152,10 @@
 RUSTFLAGS+=	${CFLAGS:M-mcpu=*:S/-mcpu=/-C target-cpu=/}
 .endif
 
+.if defined(WITH_CCACHE_BUILD)
+MOZ_OPTIONS+=	--with-ccache
+.endif
+
 .if ${MOZILLA_VER:R:R} < 55 && ${OPSYS} == FreeBSD && ${OSVERSION} < 1200032
 # use jemalloc 3.0.0 (4.0 for firefox 43+) API for stats/tuning
 MOZ_EXPORT+=	MOZ_JEMALLOC4=1