diff --git a/builtin/update-microsoft-git.c b/builtin/update-microsoft-git.c
index 66e4d8c25fab41..f943b808615fd7 100644
--- a/builtin/update-microsoft-git.c
+++ b/builtin/update-microsoft-git.c
@@ -56,26 +56,8 @@ static int platform_specific_upgrade(void)
 #else
 static int platform_specific_upgrade(void)
 {
-	int res;
-	struct strvec args = STRVEC_INIT;
-
-	printf("Updating apt-get with 'sudo apt-get update'\n\n");
-
-	strvec_pushl(&args, "sudo", "apt-get", "update", NULL);
-	res = run_command_v_opt(args.v, 0);
-	strvec_clear(&args);
-
-	if (res) {
-		error(_("'sudo apt-get update' failed; is apt-get installed?"));
-		return 1;
-	}
-
-	printf("\nUpgrading microsoft-git with 'sudo apt-get upgrade microsoft-git'\n\n");
-	strvec_pushl(&args, "sudo", "apt-get", "upgrade", "microsoft-git", NULL);
-	res = run_command_v_opt(args.v, 0);
-	strvec_clear(&args);
-
-	return res;
+	error(_("update-microsoft-git is not supported on this platform"));
+	return 1;
 }
 #endif
 
diff --git a/read-cache.c b/read-cache.c
index c1a6abb8168aa9..8d1cdef9987d55 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -2411,7 +2411,8 @@ int do_read_index(struct index_state *istate, const char *path, int must_exist)
 	 * settings and other properties of the index (if necessary).
 	 */
 	prepare_repo_settings(istate->repo);
-	if (istate->repo->settings.command_requires_full_index)
+	if (!istate->repo->settings.sparse_index ||
+	    istate->repo->settings.command_requires_full_index)
 		ensure_full_index(istate);
 	else
 		ensure_correct_sparsity(istate);