diff --git a/taskcluster/ci/merge-corpus/kind.yml b/taskcluster/ci/merge-corpus/kind.yml
index 12ebd7a0b..7af6fdc8f 100644
--- a/taskcluster/ci/merge-corpus/kind.yml
+++ b/taskcluster/ci/merge-corpus/kind.yml
@@ -73,6 +73,7 @@ tasks:
 
         treeherder:
             symbol: "{src_locale}-{trg_locale}"
+            platform: merge-corpus/opt
         run:
             using: run-task
             command-context: {}
@@ -83,7 +84,7 @@ tasks:
                 # 1) output directory
                 # 2) input files
                 - >-
-                    export BIN=$MOZ_FETCHES_DIR
+                    export BIN=$MOZ_FETCHES_DIR &&
                     $VCS_PATH/pipeline/clean/merge-corpus.sh
                     artifacts
                     $MOZ_FETCHES_DIR/*.zst