diff --git a/apps/bootstrap-installer/src-tauri/src/bootstrap.rs b/apps/bootstrap-installer/src-tauri/src/bootstrap.rs
index 7d2c4bfaea..50dd3a6999 100644
--- a/apps/bootstrap-installer/src-tauri/src/bootstrap.rs
+++ b/apps/bootstrap-installer/src-tauri/src/bootstrap.rs
@@ -220,7 +220,9 @@ pub(crate) fn resolve_hermes_desktop_exe(install_root: &std::path::Path) -> Opti
             ("mac-arm64/Hermes.app/Contents/MacOS", "Hermes"),
         ]
     } else {
-        &[("linux-unpacked", "hermes")]
+        // electron-builder names the x64 dir `linux-unpacked` and every other
+        // arch `linux-<arch>-unpacked` (#94703).
+        &[("linux-unpacked", "hermes"), ("linux-arm64-unpacked", "hermes")]
     };
     for (subdir, exe) in candidates {
         let p = release_dir.join(subdir).join(exe);
@@ -1136,6 +1138,21 @@ mod tests {
         let _ = std::fs::remove_dir_all(&root);
     }
 
+    // electron-builder writes ARM64 Linux builds to `linux-arm64-unpacked`; only
+    // x64 uses the bare `linux-unpacked` name (#94703).
+    #[cfg(target_os = "linux")]
+    #[test]
+    fn resolve_hermes_desktop_exe_finds_arm64_linux_build() {
+        let root = unique_tmp_dir("app-linux-arm64");
+        let dir = root.join("apps/desktop/release/linux-arm64-unpacked");
+        std::fs::create_dir_all(&dir).unwrap();
+        let exe = dir.join("hermes");
+        std::fs::write(&exe, b"stub").unwrap();
+
+        assert_eq!(resolve_hermes_desktop_exe(&root), Some(exe));
+        let _ = std::fs::remove_dir_all(&root);
+    }
+
     #[test]
     fn resolve_hermes_desktop_app_is_none_without_a_build() {
         let root = unique_tmp_dir("app-none");
diff --git a/apps/bootstrap-installer/src-tauri/src/update.rs b/apps/bootstrap-installer/src-tauri/src/update.rs
index 0ddc81f3b1..b7cebf4f6e 100644
--- a/apps/bootstrap-installer/src-tauri/src/update.rs
+++ b/apps/bootstrap-installer/src-tauri/src/update.rs
@@ -706,7 +706,11 @@ fn desktop_app_payload_paths(install_root: &Path) -> Vec<PathBuf> {
             release.join("mac-arm64").join("Hermes.app").join("Contents").join("Resources").join("app.asar"),
         ]
     } else {
-        vec![release.join("linux-unpacked").join("resources").join("app.asar")]
+        // x64 builds land in `linux-unpacked`, ARM64 in `linux-arm64-unpacked` (#94703).
+        vec![
+            release.join("linux-unpacked").join("resources").join("app.asar"),
+            release.join("linux-arm64-unpacked").join("resources").join("app.asar"),
+        ]
     }
 }
 
@@ -1270,6 +1274,18 @@ mod tests {
         );
     }
 
+    #[cfg(target_os = "linux")]
+    #[test]
+    fn lock_probe_paths_cover_arm64_linux_build() {
+        let root = Path::new("/x/hermes-agent");
+        let probes = install_lock_probe_paths(root);
+
+        for dir in ["linux-unpacked", "linux-arm64-unpacked"] {
+            let asar = root.join("apps/desktop/release").join(dir).join("resources/app.asar");
+            assert!(probes.contains(&asar), "{dir} payload must be probed (#94703)");
+        }
+    }
+
     #[test]
     fn locked_paths_ignores_missing_payloads() {
         let root = Path::new("/nonexistent/hermes-agent");