V10 3 2 bugfix + revert #347 (#382)

* Revert "run_custom_command: use interactive shell on unix (#347)"

This reverts commit d767ef31a5.

* v10-3-3 + revert of #347

src/steps/generic.rs

@@ -505,10 +505,7 @@ pub fn run_myrepos_update(base_dirs: &BaseDirs, run_type: RunType) -> Result<()>
 
 pub fn run_custom_command(name: &str, command: &str, ctx: &ExecutionContext) -> Result<()> {
     print_separator(name);
-    let mut exec = ctx.run_type().execute(shell());
-    #[cfg(unix)]
-    exec.arg("-i");
-    exec.arg("-c").arg(command).status_checked()
+    ctx.run_type().execute(shell()).arg("-c").arg(command).status_checked()
 }
 
 pub fn run_composer_update(ctx: &ExecutionContext) -> Result<()> {