diff --git a/.github/workflows/release-ci.yml b/.github/workflows/release-ci.yml
index 378d7279..e284298e 100644
--- a/.github/workflows/release-ci.yml
+++ b/.github/workflows/release-ci.yml
@@ -37,6 +37,8 @@ jobs:
 
       - name: Build frontend
         working-directory: rustmail_panel
+        env:
+          RUSTFLAGS: '-Csymbol-mangling-version=legacy -Zunstable-options'
         run: trunk build --release --dist ../rustmail/static --config Trunk.toml
 
       - name: Build Rust backend
@@ -98,6 +100,8 @@ jobs:
 
       - name: Build frontend
         working-directory: rustmail_panel
+        env:
+          RUSTFLAGS: '-Csymbol-mangling-version=legacy -Zunstable-options'
         run: trunk build --release --dist ../rustmail/static --config Trunk.toml
 
       - name: Verify static files were created