diff --git a/tools/build/Makefile b/tools/build/Makefile
index a5b3c29b8d70..3a5a3808ab2a 100644
--- a/tools/build/Makefile
+++ b/tools/build/Makefile
@@ -37,8 +37,6 @@ ifneq ($(wildcard $(TMP_O)),)
 	$(Q)$(MAKE) -C feature OUTPUT=$(TMP_O) clean >/dev/null
 endif
 
-include $(srctree)/tools/build/Makefile.include
-
 FIXDEP		:= $(OUTPUT)fixdep
 FIXDEP_IN	:= $(OUTPUT)fixdep-in.o
 
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 47c906b807ef..02f87c49801f 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -234,12 +234,12 @@ endif
 # The fixdep build - we force fixdep tool to be built as
 # the first target in the separate make session not to be
 # disturbed by any parallel make jobs. Once fixdep is done
-# we issue the requested build with FIXDEP=1 variable.
+# we issue the requested build with FIXDEP_BUILT=1 variable.
 #
 # The fixdep build is disabled for $(NON_CONFIG_TARGETS)
 # targets, because it's not necessary.
 
-ifdef FIXDEP
+ifdef FIXDEP_BUILT
   force_fixdep := 0
 else
   force_fixdep := $(config)
@@ -286,7 +286,7 @@ $(goals) all: sub-make
 
 sub-make: fixdep
 	@./check-headers.sh
-	$(Q)$(MAKE) FIXDEP=1 -f Makefile.perf $(goals)
+	$(Q)$(MAKE) FIXDEP_BUILT=1 -f Makefile.perf $(goals)
 
 else # force_fixdep