diff --git a/.kokoro/trampoline_v2.sh b/.kokoro/trampoline_v2.sh
index 5ae75f977..606d43214 100755
--- a/.kokoro/trampoline_v2.sh
+++ b/.kokoro/trampoline_v2.sh
@@ -125,6 +125,8 @@ pass_down_envvars=(
     "TRAMPOLINE_CI"
     # Indicates the version of the script.
     "TRAMPOLINE_VERSION"
+    # Contains path to build artifacts being executed.
+    "KOKORO_BUILD_ARTIFACTS_SUBDIR"
 )
 
 log_yellow "Building with Trampoline ${TRAMPOLINE_VERSION}"
diff --git a/synth.metadata b/synth.metadata
index dc28e0b4b..d0b00321b 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/release-please.git",
-        "sha": "609164ce23ddb9af369b01855581157e9ea891e3"
+        "sha": "f0852f6daa37756e947020587e4f1ca89a16aaa9"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "89c849ba5013e45e8fb688b138f33c2ec6083dc5"
+        "sha": "ba9918cd22874245b55734f57470c719b577e591"
       }
     }
   ],