/* FIXME: move prefix to startup_info struct and get rid of this arg */
 void trace_repo_setup(const char *prefix)
 {
+       static const char *key = "GIT_TRACE_SETUP";
        const char *git_work_tree;
        char cwd[PATH_MAX];
 
-       if (!trace_want("GIT_TRACE"))
+       if (!trace_want(key))
                return;
 
        if (!getcwd(cwd, PATH_MAX))
        if (!prefix)
                prefix = "(null)";
 
-       trace_printf("setup: git_dir: %s\n", quote_crnl(get_git_dir()));
-       trace_printf("setup: worktree: %s\n", quote_crnl(git_work_tree));
-       trace_printf("setup: cwd: %s\n", quote_crnl(cwd));
-       trace_printf("setup: prefix: %s\n", quote_crnl(prefix));
+       trace_printf_key(key, "setup: git_dir: %s\n", quote_crnl(get_git_dir()));
+       trace_printf_key(key, "setup: worktree: %s\n", quote_crnl(git_work_tree));
+       trace_printf_key(key, "setup: cwd: %s\n", quote_crnl(cwd));
+       trace_printf_key(key, "setup: prefix: %s\n", quote_crnl(prefix));
 }
 
 int trace_want(const char *key)