--- ./cli/tools/upgrade.rs.orig	2022-01-20 19:18:16.459123964 +0530
+++ ./cli/tools/upgrade.rs	2022-01-20 19:27:18.071118123 +0530
@@ -22,6 +22,7 @@
 
 const RELEASE_URL: &str = "https://github.com/denoland/deno/releases";
 
+#[cfg(not(target_os = "android"))]
 pub async fn upgrade(upgrade_flags: UpgradeFlags) -> Result<(), AnyError> {
   let mut client_builder = Client::builder();
 
@@ -135,6 +136,12 @@
   Ok(())
 }
 
+#[cfg(target_os = "android")]
+pub async fn upgrade(upgrade_flags: UpgradeFlags) -> Result<(), AnyError> {
+  println!("You are currently using Deno packaged by the Termux repo. To upgrade Deno, wait for the packagers to update it. This is done to prevent you from breaking your installation.");
+  std::process::exit(1);
+}
+
 async fn get_latest_release_version(
   client: &Client,
 ) -> Result<String, AnyError> {