diff --git a/pkgs/applications/terminal-emulators/mlterm/default.nix b/pkgs/applications/terminal-emulators/mlterm/default.nix
index 95d63d7724594..5413ee142692e 100644
--- a/pkgs/applications/terminal-emulators/mlterm/default.nix
+++ b/pkgs/applications/terminal-emulators/mlterm/default.nix
@@ -1,6 +1,5 @@
-args@{
+{
   stdenv,
-  gcc13Stdenv,
   lib,
   fetchFromGitHub,
   pkg-config,
@@ -99,7 +98,6 @@ let
       commaSepList = lib.concatStringsSep "," (builtins.attrNames (lib.filterAttrs (n: v: v) attrset));
     in
     lib.withFeatureAs (commaSepList != "") featureName commaSepList;
-  stdenv = if args.stdenv.cc.isGNU then args.gcc13Stdenv else args.stdenv;
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "mlterm";
diff --git a/pkgs/tools/inputmethods/uim/default.nix b/pkgs/tools/inputmethods/uim/default.nix
index 94fac0cb443fc..ffd3955a31811 100644
--- a/pkgs/tools/inputmethods/uim/default.nix
+++ b/pkgs/tools/inputmethods/uim/default.nix
@@ -1,8 +1,8 @@
-args@{
+{
   lib,
   stdenv,
-  gcc13Stdenv,
   fetchFromGitHub,
+  fetchpatch,
   shared-mime-info,
   autoconf,
   automake,
@@ -53,20 +53,16 @@ assert withNetworking -> curl != null && openssl != null;
 assert withFFI -> libffi != null;
 assert withMisc -> libeb != null;
 
-let
-  stdenv = if args.stdenv.cc.isGNU then args.gcc13Stdenv else args.stdenv;
-in
-
 stdenv.mkDerivation rec {
-  version = "1.8.9";
+  version = "1.8.8";
   pname = "uim";
 
   src = fetchFromGitHub {
     owner = "uim";
     repo = "uim";
-    rev = version;
+    rev = "2c0958c9c505a87e70e344c2192e2e5123c71ea5";
     fetchSubmodules = true;
-    hash = "sha256-OqbtuoV9xPg51BhboP4EtTZA2psd8sUk3l3RfvYtv3w=";
+    sha256 = "1hkjxi5r49gcna37m3jvykny5hz9ram4y8a3q7lw4qzr52mz9pdp";
   };
 
   nativeBuildInputs =
@@ -124,6 +120,18 @@ stdenv.mkDerivation rec {
 
   patches = [
     ./data-hook.patch
+
+    # Pull upstream fix for -fno-common toolchains
+    #   https://github.com/uim/libgcroots/pull/4
+    (fetchpatch {
+      name = "libgcroots-fno-common.patch";
+      url = "https://github.com/uim/libgcroots/commit/7e39241344ad0663409e836560ae6b5eb231e1fc.patch";
+      sha256 = "0iifcl5lk8bvl0cflm47gkymg88aiwzj0gxh2aj3mqlyhvyx78nz";
+      # Patch comes from git submodule. Relocate as:
+      # a/include/private/gc_priv.h -> a/sigscheme/libgcroots/include/private/gc_priv.h
+      stripLen = 1;
+      extraPrefix = "sigscheme/libgcroots/";
+    })
   ];
 
   configureFlags =
@@ -168,8 +176,6 @@ stdenv.mkDerivation rec {
     export XDG_DATA_DIRS="${shared-mime-info}/share"
   '';
 
-  enableParallelBuilding = false;
-
   dontUseCmakeConfigure = true;
 
   meta = with lib; {