diff --git a/package/libs/libubox/Makefile b/package/libs/libubox/Makefile
index d2c07783e1..42a3f4ac3c 100644
--- a/package/libs/libubox/Makefile
+++ b/package/libs/libubox/Makefile
@@ -67,7 +67,7 @@ define Package/libubox-lua
 endef
 
 TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include
-CMAKE_OPTIONS = \
+CMAKE_OPTIONS += \
 	-DLUAPATH=/usr/lib/lua \
 	-DABIVERSION="$(PKG_ABI_VERSION)"
 
diff --git a/package/network/services/uhttpd/Makefile b/package/network/services/uhttpd/Makefile
index de666a480d..781512bd99 100644
--- a/package/network/services/uhttpd/Makefile
+++ b/package/network/services/uhttpd/Makefile
@@ -85,7 +85,7 @@ endif
 
 TARGET_LDFLAGS += -lcrypt
 
-CMAKE_OPTIONS = -DTLS_SUPPORT=on
+CMAKE_OPTIONS += -DTLS_SUPPORT=on
 
 define Package/uhttpd/install
 	$(INSTALL_DIR) $(1)/etc/init.d
diff --git a/package/system/ubus/Makefile b/package/system/ubus/Makefile
index 8a3fd1de7b..e39de3c5dc 100644
--- a/package/system/ubus/Makefile
+++ b/package/system/ubus/Makefile
@@ -53,7 +53,7 @@ endef
 TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include -flto
 TARGET_LDFLAGS += -flto
 
-CMAKE_OPTIONS = \
+CMAKE_OPTIONS += \
 	-DLUAPATH=/usr/lib/lua \
 	-DABIVERSION="$(PKG_ABI_VERSION)"
 
diff --git a/package/system/uci/Makefile b/package/system/uci/Makefile
index 46694e619d..0b12298480 100644
--- a/package/system/uci/Makefile
+++ b/package/system/uci/Makefile
@@ -54,7 +54,7 @@ endef
 TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include
 TARGET_LDFLAGS += -L$(STAGING_DIR)/usr/lib
 
-CMAKE_OPTIONS = \
+CMAKE_OPTIONS += \
 	-DLUAPATH=/usr/lib/lua \
 	$(if $(DEBUG),-DUCI_DEBUG=ON)