for linux build

src-tauri/Cargo.toml

@@ -27,6 +27,12 @@ tauri-build = { version = "2", features = [] }
 
 [target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies]
 tauri-plugin-single-instance = "2"
+
+# Self-updating only makes sense for install methods this app ships itself
+# (NSIS on Windows, the .app bundle on macOS). On Linux the app is meant to be
+# installed via the system package manager (e.g. the PKGBUILD), which owns
+# updates instead — so the updater plugin isn't even compiled in there.
+[target.'cfg(not(any(target_os = "android", target_os = "ios", target_os = "linux")))'.dependencies]
 tauri-plugin-updater = "2"
 
 # ── Build profiles ───────────────────────────────────────────────────────────