diff --git a/scripts/kconfig/.gitignore b/scripts/kconfig/.gitignore
index 624f6502e03e..ee120d441565 100644
--- a/scripts/kconfig/.gitignore
+++ b/scripts/kconfig/.gitignore
@@ -2,7 +2,7 @@
 # Generated files
 #
 config*
-lex.*.c
+*.lex.c
 *.tab.c
 *.tab.h
 zconf.hash.c
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index bde4529a4d4e..ee3f4fa0e04f 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -223,6 +223,9 @@ HOST_EXTRACFLAGS += $(shell $(CONFIG_SHELL) $(srctree)/$(src)/check.sh $(HOSTCC)
 HOSTCFLAGS_lex.zconf.o	:= -I$(src)
 HOSTCFLAGS_zconf.tab.o	:= -I$(src)
 
+LEX_PREFIX_zconf	:= zconf
+YACC_PREFIX_zconf	:= zconf
+
 HOSTLOADLIBES_qconf	= $(KC_QT_LIBS) -ldl
 HOSTCXXFLAGS_qconf.o	= $(KC_QT_CFLAGS) -D LKC_DIRECT_LINK
 
@@ -335,28 +338,3 @@ $(obj)/gconf.glade.h: $(obj)/gconf.glade
 	$(Q)intltool-extract --type=gettext/glade --srcdir=$(srctree) \
 	$(obj)/gconf.glade
 
-###
-# The following requires flex/bison/gperf
-# By default we use the _shipped versions, uncomment the following line if
-# you are modifying the flex/bison src.
-# LKC_GENPARSER := 1
-
-ifdef LKC_GENPARSER
-
-$(obj)/zconf.tab.c: $(src)/zconf.y
-$(obj)/lex.zconf.c: $(src)/zconf.l
-$(obj)/zconf.hash.c: $(src)/zconf.gperf
-
-%.tab.c: %.y
-	bison -l -b $* -p $(notdir $*) $<
-	cp $@ $@_shipped
-
-lex.%.c: %.l
-	flex -L -P$(notdir $*) -o$@ $<
-	cp $@ $@_shipped
-
-%.hash.c: %.gperf
-	gperf -C < $< > $@
-	cp $@ $@_shipped
-
-endif
diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
index 377d04d832d1..c38cc5aa8ed1 100644
--- a/scripts/kconfig/zconf.y
+++ b/scripts/kconfig/zconf.y
@@ -733,7 +733,7 @@ void zconfdump(FILE *out)
 	}
 }
 
-#include "lex.zconf.c"
+#include "zconf.lex.c"
 #include "util.c"
 #include "confdata.c"
 #include "expr.c"