diff --git a/Makefile b/Makefile
index 518dd8e..3540d20 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,12 @@ PREFIX := .
 
 CP := cp -f
 
+CFLAGS   := -std=c89 -Wall -Wextra -Wpedantic -Wshadow -Wundef
+CPPFLAGS := -D_FORTIFY_SOURCE=2
+
+export CFLAGS
+export CPPFLAGS
+
 all: plug/libplug.so src/plugin
 
 plug/libplug.so:
diff --git a/plug/Makefile b/plug/Makefile
index 6c827ae..999a1dc 100644
--- a/plug/Makefile
+++ b/plug/Makefile
@@ -1,5 +1,3 @@
-include ../root.mk
-
 CFLAGS += -shared -fPIE
 
 libplug.so: plug.o
diff --git a/root.mk b/root.mk
deleted file mode 100644
index 1c92c3f..0000000
--- a/root.mk
+++ /dev/null
@@ -1,6 +0,0 @@
-CFLAGS   := -std=c89 -Wall -Wextra -Wpedantic -Wshadow -Wundef
-CPPFLAGS := -D_FORTIFY_SOURCE=2
-LDLIBS   := -lplug
-
-.c.o:
-	${COMPILE.c} $< -o $@
diff --git a/src/Makefile b/src/Makefile
index 72d7624..43c9359 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,5 +1,3 @@
-include ../root.mk
-
 CPPFLAGS += -I../plug -L../plug
 
 plugin: main.o