diff --git a/build_helper/build_helper_configs.py b/build_helper/build_helper_configs.py
index c655dc0..bd124e0 100755
--- a/build_helper/build_helper_configs.py
+++ b/build_helper/build_helper_configs.py
@@ -141,21 +141,34 @@
                                           "bin/tfm_s_signed.bin "
                                           "image_signing/scripts/tfm_ns_signed.bin ;"
                                           "popd"),
-                   "nxp/lpcxpresso55s69": ("echo 'LPCXpresso55S69 board post process\n';"
-                                            "if [ -f \"%(ci_build_root_dir)s/spe/bin/bl2.hex\" ]; then FLASH_FILE='flash_bl2_JLink.py'; else FLASH_FILE='flash_JLink.py'; fi;"
-                                            "mkdir -p %(codebase_root_dir)s/build/bin ;"
-                                            # Workaround for flash_JLink.py
-                                            "cp %(ci_build_root_dir)s/spe/bin/tfm_s.hex %(codebase_root_dir)s/build/bin ;"
-                                            "cp %(ci_build_root_dir)s/nspe/bin/tfm_ns.hex %(codebase_root_dir)s/build/bin ;"
-                                            "pushd %(codebase_root_dir)s/platform/ext/target/nxp/lpcxpresso55s69/scripts;"
-                                            "LN=$(grep -n 'JLinkExe' ${FLASH_FILE}|awk -F: '{print $1}');"
-                                            "sed -i \"${LN}s/.*/    print('flash.jlink generated')/\" ${FLASH_FILE};"
-                                            "python3 ./${FLASH_FILE};"
-                                            "cd %(codebase_root_dir)s/build/bin;"
-                                            "BIN_FILES=$(grep loadfile flash.jlink | awk '{print $2}');"
-                                            "tar jcf lpcxpresso55s69-tfm.tar.bz2 flash.jlink ${BIN_FILES};"
-                                            "mv lpcxpresso55s69-tfm.tar.bz2 %(ci_build_root_dir)s/nspe/bin ;"
-                                            "popd"),
+                   "nxp/lpcxpresso55s69": ("echo 'LPCXpresso55S69 bo.ard post process\n';"
+                                           "mkdir -p %(codebase_root_dir)s/build/bin ;"
+                                           # Workaround for flash_JLink.py
+                                           "cp %(ci_build_root_dir)s/spe/bin/tfm_s.hex %(codebase_root_dir)s/build/bin ;"
+                                           "cp %(ci_build_root_dir)s/nspe/bin/tfm_ns.hex %(codebase_root_dir)s/build/bin ;"
+                                           "cd %(codebase_root_dir)s/build/bin; "
+                                           "rm -f flash.jlink; "
+                                           "if [ -f \"%(ci_build_root_dir)s/spe/bin/bl2.hex\" ]; then "
+                                           "echo r >> flash.jlink; "
+                                           "echo erase >> flash.jlink; "
+                                           "echo loadfile bl2.hex >> flash.jlink; "
+                                           "echo loadfile tfm_s_ns_signed.bin -0x8000 >> flash.jlink; "
+                                           "echo r >> flash.jlink; "
+                                           "echo go >> flash.jlink; "
+                                           "echo exit >> flash.jlink; "
+                                           "else "
+                                           "echo r >> flash.jlink; "
+                                           "echo erase >> flash.jlink; "
+                                           "echo loadfile tfm_s.hex >> flash.jlink; "
+                                           "echo loadfile tfm_ns.hex >> flash.jlink; "
+                                           "echo r >> flash.jlink; "
+                                           "echo go >> flash.jlink; "
+                                           "echo exit >> flash.jlink; "
+                                           "fi;"
+                                           "BIN_FILES=$(grep loadfile flash.jlink | awk '{print $2}');"
+                                           "tar jcf lpcxpresso55s69-tfm.tar.bz2 flash.jlink ${BIN_FILES};"
+                                           "mv lpcxpresso55s69-tfm.tar.bz2 %(ci_build_root_dir)s/nspe/bin ;"
+                                           "BIN_FILES=$(grep loadfile flash.jlink | awk '{print $2}');"),
                    "cypress/psoc64": ("echo 'Sign binaries for Cypress PSoC64 platform';"
                                        "pushd %(codebase_root_dir)s/;"
                                        "sudo /usr/local/bin/cysecuretools "