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-rw-r--r--cli/build.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/cli/build.rs b/cli/build.rs
index ab2a7d0f7..410201410 100644
--- a/cli/build.rs
+++ b/cli/build.rs
@@ -131,6 +131,10 @@ fn create_compiler_snapshot(
"es2020.sharedmemory",
"es2020.string",
"es2020.symbol.wellknown",
+ "es2021",
+ "es2021.promise",
+ "es2021.string",
+ "es2021.weakref",
"esnext",
"esnext.intl",
"esnext.promise",