Index: benchmark/Makefile.am
===================================================================
--- benchmark/Makefile.am	(revision 158b026fb8f759ed1b6cebe96e8a07ccb25235cb)
+++ benchmark/Makefile.am	(revision ecc0fecf067e44563ae69bc41882d9215fa37408)
@@ -22,5 +22,5 @@
 
 AM_CFLAGS = -O2 -Wall -Wextra -I$(srcdir) -lrt -pthread # -Werror
-AM_CFAFLAGS = -quiet -nodebug -in-tree
+AM_CFAFLAGS = -quiet -nodebug
 AM_UPPFLAGS = -quiet -nodebug -multi -std=c++14
 
Index: benchmark/Makefile.in
===================================================================
--- benchmark/Makefile.in	(revision 158b026fb8f759ed1b6cebe96e8a07ccb25235cb)
+++ benchmark/Makefile.in	(revision ecc0fecf067e44563ae69bc41882d9215fa37408)
@@ -376,5 +376,5 @@
 # applies to both programs
 AM_CFLAGS = -O2 -Wall -Wextra -I$(srcdir) -lrt -pthread # -Werror
-AM_CFAFLAGS = -quiet -nodebug -in-tree
+AM_CFAFLAGS = -quiet -nodebug
 AM_UPPFLAGS = -quiet -nodebug -multi -std=c++14
 BENCH_V_CC = $(__bench_v_CC_$(__quiet))