diff --git a/Mk/Uses/meson.mk b/Mk/Uses/meson.mk
--- a/Mk/Uses/meson.mk
+++ b/Mk/Uses/meson.mk
@@ -66,7 +66,7 @@
 CONFIGURE_ARGS+=	-Db_colorout=never
 
 # meson has it own strip mechanic
-INSTALL_TARGET=		install
+INSTALL_TARGET?=	install
 
 # should we have strip separate from WITH_DEBUG?
 .  if defined(WITH_DEBUG)
@@ -89,25 +89,25 @@
 
 HAS_CONFIGURE=		yes
 .  if !empty(meson_ARGS:Mmuon)
-CONFIGURE_CMD=		muon
+CONFIGURE_CMD?=		muon
 .  else
-CONFIGURE_CMD=		meson
+CONFIGURE_CMD?=		meson
 .  endif
 
 # Pull in manual set settings and from options
 CONFIGURE_ARGS+=	${MESON_ARGS}
 
-BUILD_WRKSRC=		${WRKSRC}/${MESON_BUILD_DIR}
+BUILD_WRKSRC?=		${WRKSRC}/${MESON_BUILD_DIR}
 
-INSTALL_WRKSRC=		${WRKSRC}/${MESON_BUILD_DIR}
+INSTALL_WRKSRC?=	${WRKSRC}/${MESON_BUILD_DIR}
 
 TEST_ENV+=		MESON_TESTTHREADS=${MAKE_JOBS_NUMBER}
-TEST_WRKSRC=		${WRKSRC}/${MESON_BUILD_DIR}
-TEST_TARGET=		test
+TEST_WRKSRC?=		${WRKSRC}/${MESON_BUILD_DIR}
+TEST_TARGET?=		test
 
 MESON_BUILD_DIR?=	_build
 
-CONFIGURE_LOG=		${MESON_BUILD_DIR}/meson-logs/meson-log.txt
+CONFIGURE_LOG?=		${MESON_BUILD_DIR}/meson-logs/meson-log.txt
 
 # Add meson build dir at the end.
 CONFIGURE_ARGS+=	${MESON_BUILD_DIR}