diff --git a/open_posix_testsuite/conformance/definitions/BUILD.gn b/open_posix_testsuite/conformance/definitions/BUILD.gn
index c6728223edbffed34681aec0c7d260b157e99a4f..37c36198dd3ee6f099a886f6a9656a6142ed4874 100644
--- a/open_posix_testsuite/conformance/definitions/BUILD.gn
+++ b/open_posix_testsuite/conformance/definitions/BUILD.gn
@@ -17,7 +17,8 @@ open_source_suite("ActsOpenPosixBuildOnlyTest") {
   suite_name = "acts"
   exec_command_path = "//third_party/ltp/testcases/open_posix_testsuite/"
   compiler = rebase_path("${ohos_build_compiler_dir}/bin/${ohos_build_compiler}")
-  prebuild_command = "make clean && make distclean && ./scripts/generate-makefiles.sh $compiler ${ohos_root_path} && make -j -C conformance/definitions"
+  sysroot_path = rebase_path(ohos_current_sysroot)
+  prebuild_command = "make clean && make distclean && ./scripts/generate-makefiles.sh $compiler ${ohos_root_path} ${sysroot_path} && make -j -C conformance/definitions"
   exec_sub_dir = "conformance/definitions"
   build_args = [
     "signal_h/logfile",
diff --git a/open_posix_testsuite/ltp-patch/generate-makefiles.sh.patch b/open_posix_testsuite/ltp-patch/generate-makefiles.sh.patch
index 0f7f3ae26e99f9db8dffee38c233a139ce5bbdae..82da72a8f582cbccb0aa23ad40eeb5cd2d66d4b8 100644
--- a/open_posix_testsuite/ltp-patch/generate-makefiles.sh.patch
+++ b/open_posix_testsuite/ltp-patch/generate-makefiles.sh.patch
@@ -1,5 +1,5 @@
---- third_party/ltp/testcases/open_posix_testsuite/scripts/generate-makefiles.sh	2020-09-03 20:31:21.369825435 +0800
-+++ test/xts/acts/open_posix_testsuite/ltp-patch/generate-makefiles.sh	2020-09-03 20:33:42.534681514 +0800
+--- third_party/ltp/testcases/open_posix_testsuite/scripts/generate-makefiles.sh	2021-07-03 15:38:26.370000000 +0800
++++ test/xts/acts/open_posix_testsuite/ltp-patch/generate-makefiles.sh	2021-07-03 15:28:41.940000000 +0800
 @@ -107,6 +107,7 @@
  #
  
@@ -12,16 +12,17 @@
  
  # Build variables
  CFLAGS+=		-I\$(top_srcdir)/include
-+CFLAGS+=        --target=arm-liteos --sysroot=${BUILD_ROOT_PATH}prebuilts/lite/sysroot
++CFLAGS+=        --target=arm-liteos --sysroot=${SYSROOT_PATH}
  
  # XXX: for testfrmw.c -- needs to be moved into a library.
  CFLAGS+=		-I\$(srcdir)
-@@ -303,6 +305,8 @@
+@@ -303,6 +305,9 @@
  GLOBAL_BOILERPLATE="${TOP_SRCDIR}/.global_boilerplate"
  
  CONFIG_MK="../../include/mk/config-openposix.mk"
 +COMPILE_PATH=$1
 +BUILD_ROOT_PATH=$2
++SYSROOT_PATH=$3
  
  rm -f "$GLOBAL_BOILERPLATE"