diff --git a/ChangeLog.md b/ChangeLog.md
index a9ae33783..6e6dcf79f 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -8,6 +8,8 @@ This project's release branch is `master`. This log is written from the perspect
   * [#919](https://github.com/obsidiansystems/obelisk/pull/919): Document useful command for testing obelisk branches to CONTRIBUTING.md
   * [#913](https://github.com/obsidiansystems/obelisk/pull/913): Add haddocks to Obelisk.Command.Deploy
   * [#931](https://github.com/obsidiansystems/obelisk/pull/931): For `ob deploy init`, command-line option `--check-known-host` corrected in readme, caveat added for multiple matching host-keypairs.
+* building
+  * [#956](https://github.com/obsidiansystems/obelisk/pull/956): Squelch closure-compiler warnings. They are not very helpful and can cause issues (see: [closure-compiler#3720](https://github.com/google/closure-compiler/issues/3720))
 * nixpkgs-overlays
   * Remove override of acme module that pinned it to the version in nixpkgs-20.03. This is used for automatic https certificate provisioning.
 * CLI
diff --git a/default.nix b/default.nix
index 248653e94..2f25f191f 100644
--- a/default.nix
+++ b/default.nix
@@ -87,7 +87,7 @@ in rec {
       ${if optimizationLevel == null then ''
         ln -s "$dir/all.unminified.js" "$dir/all.js"
       '' else ''
-        '${pkgs.closurecompiler}/bin/closure-compiler' ${if externs == null then "" else "--externs '${externs}'"} --externs '${reflex-platform.ghcjsExternsJs}' -O '${optimizationLevel}' --jscomp_warning=checkVars --create_source_map="$dir/all.js.map" --source_map_format=V3 --js_output_file="$dir/all.js" "$dir/all.unminified.js"
+        '${pkgs.closurecompiler}/bin/closure-compiler' ${if externs == null then "" else "--externs '${externs}'"} --externs '${reflex-platform.ghcjsExternsJs}' -O '${optimizationLevel}' --jscomp_warning=checkVars --warning_level=QUIET --create_source_map="$dir/all.js.map" --source_map_format=V3 --js_output_file="$dir/all.js" "$dir/all.unminified.js"
         echo '//# sourceMappingURL=all.js.map' >> "$dir/all.js"
       ''}
     done