fix: fix self-install cross-device move

CHANGELOG.md

@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+### Fixed
+- Fix `self-install` doing a cross-device move by @daimond113
+
 ## [0.5.0-rc.9] - 2024-11-16
 ### Fixed
 - Correctly link Wally server packages by @daimond113

src/cli/version.rs

@@ -287,11 +287,13 @@ pub async fn update_bin_exe(downloaded_file: &Path) -> anyhow::Result<()> {
     ));
     let mut downloaded_file = downloaded_file.to_path_buf();
 
-    if cfg!(target_os = "linux") && bin_exe_path.exists() {
+    let exists = bin_exe_path.exists();
+
+    if cfg!(target_os = "linux") && exists {
         fs::remove_file(&bin_exe_path)
             .await
             .context("failed to remove existing executable")?;
-    } else {
+    } else if exists {
         let tempfile = tempfile::Builder::new()
             .make(|_| Ok(()))
             .context("failed to create temporary file")?;