+--- nnn-3.3/Makefile.orig 2020-08-06 12:43:07.917453708 +0200
++++ nnn-3.3/Makefile 2020-08-06 12:46:43.682792814 +0200
+@@ -41,7 +41,7 @@
+ endif
+
+ ifeq ($(O_PCRE),1)
+- CPPFLAGS += -DPCRE
++ override CPPFLAGS += -DPCRE
+ LDLIBS += -lpcre
+ endif
+
+@@ -62,7 +62,7 @@
+ endif
+
+ ifeq ($(O_CTX8),1)
+- CPPFLAGS += -DCTX8
++ override CPPFLAGS += -DCTX8
+ endif
+
+ ifeq ($(shell $(PKG_CONFIG) ncursesw && echo 1),1)
+@@ -75,9 +75,9 @@
+ LDLIBS_CURSES ?= -lncurses
+ endif
+
+-CFLAGS += -std=c11 -Wall -Wextra -Wshadow
+-CFLAGS += $(CFLAGS_OPTIMIZATION)
+-CFLAGS += $(CFLAGS_CURSES)
++override CFLAGS += -std=c11 -Wall -Wextra -Wshadow
++override CFLAGS += $(CFLAGS_OPTIMIZATION)
++override CFLAGS += $(CFLAGS_CURSES)
+
+ LDLIBS += $(LDLIBS_CURSES)
+