diff --git a/flake/dev.nix b/flake/dev.nix
index f887fd68..ed494359 100644
--- a/flake/dev.nix
+++ b/flake/dev.nix
@@ -1,64 +1,64 @@
 { inputs }: let inherit (inputs.self.nixosConfigurations.pc) pkgs; in
 {
-  biu = pkgs.mkShell.override { stdenv = pkgs.clang18Stdenv; }
+  biu = pkgs.mkShell
   {
     inputsFrom = [ pkgs.localPackages.biu ];
-    packages = [ pkgs.llvmPackages_18.clang-tools ];
+    packages = [ pkgs.llvmPackages.clang-tools ];
     CMAKE_EXPORT_COMPILE_COMMANDS = "1";
     hardeningDisable = [ "all" ];
   };
-  hpcstat = pkgs.mkShell.override { stdenv = pkgs.gcc14Stdenv; }
+  hpcstat = pkgs.mkShell
   {
     inputsFrom = [ (pkgs.localPackages.hpcstat.override { version = null; }) ];
-    packages = [ pkgs.llvmPackages_18.clang-tools ];
+    packages = [ pkgs.llvmPackages.clang-tools ];
     CMAKE_EXPORT_COMPILE_COMMANDS = "1";
     hardeningDisable = [ "all" ];
   };
-  sbatch-tui = pkgs.mkShell.override { stdenv = pkgs.clang18Stdenv; }
+  sbatch-tui = pkgs.mkShell
   {
     inputsFrom = [ pkgs.localPackages.sbatch-tui ];
-    packages = [ pkgs.llvmPackages_18.clang-tools ];
+    packages = [ pkgs.llvmPackages.clang-tools ];
     CMAKE_EXPORT_COMPILE_COMMANDS = "1";
     hardeningDisable = [ "all" ];
   };
-  ufo = pkgs.mkShell.override { stdenv = pkgs.clang18Stdenv; }
+  ufo = pkgs.mkShell
   {
     inputsFrom = [ pkgs.localPackages.ufo ];
-    packages = [ pkgs.llvmPackages_18.clang-tools ];
+    packages = [ pkgs.llvmPackages.clang-tools ];
     CMAKE_EXPORT_COMPILE_COMMANDS = "1";
     hardeningDisable = [ "all" ];
   };
   chn-bsub = pkgs.mkShell
   {
     inputsFrom = [ pkgs.localPackages.chn-bsub ];
-    packages = [ pkgs.llvmPackages_18.clang-tools ];
+    packages = [ pkgs.llvmPackages.clang-tools ];
     CMAKE_EXPORT_COMPILE_COMMANDS = "1";
   };
-  info = pkgs.mkShell.override { stdenv = pkgs.clang18Stdenv; }
+  info = pkgs.mkShell
   {
     inputsFrom = [ pkgs.localPackages.info ];
-    packages = [ pkgs.llvmPackages_18.clang-tools ];
+    packages = [ pkgs.llvmPackages.clang-tools ];
     CMAKE_EXPORT_COMPILE_COMMANDS = "1";
     hardeningDisable = [ "all" ];
   };
-  vm = pkgs.mkShell.override { stdenv = pkgs.clang18Stdenv; }
+  vm = pkgs.mkShell
   {
     inputsFrom = [ pkgs.localPackages.vm ];
-    packages = [ pkgs.llvmPackages_18.clang-tools ];
+    packages = [ pkgs.llvmPackages.clang-tools ];
     CMAKE_EXPORT_COMPILE_COMMANDS = "1";
     hardeningDisable = [ "all" ];
   };
-  xinli = pkgs.mkShell.override { stdenv = pkgs.clang18Stdenv; }
+  xinli = pkgs.mkShell
   {
     inputsFrom = [ pkgs.localPackages.xinli ];
-    packages = [ pkgs.llvmPackages_18.clang-tools ];
+    packages = [ pkgs.llvmPackages.clang-tools ];
     CMAKE_EXPORT_COMPILE_COMMANDS = "1";
     hardeningDisable = [ "all" ];
   };
-  missgram = pkgs.mkShell.override { stdenv = pkgs.clang18Stdenv; }
+  missgram = pkgs.mkShell
   {
     inputsFrom = [ pkgs.localPackages.missgram ];
-    packages = [ pkgs.llvmPackages_18.clang-tools ];
+    packages = [ pkgs.llvmPackages.clang-tools ];
     CMAKE_EXPORT_COMPILE_COMMANDS = "1";
     hardeningDisable = [ "all" ];
   };
diff --git a/flake/packages.nix b/flake/packages.nix
index b40f696f..69e990a6 100644
--- a/flake/packages.nix
+++ b/flake/packages.nix
@@ -12,9 +12,7 @@
       duc = pkgs.pkgsStatic.duc.override { enableCairo = false; cairo = null; pango = null; };
       glaze = pkgs.pkgs-2411.pkgsStatic.glaze.overrideAttrs
         (prev: { cmakeFlags = prev.cmakeFlags ++ [ "-Dglaze_ENABLE_FUZZING=OFF" ]; });
-      # pkgsStatic.clangStdenv have a bug
-      # https://github.com/NixOS/nixpkgs/issues/177129
-      biu = pkgs.pkgsStatic.localPackages.biu.override { stdenv = pkgs.pkgsStatic.gcc14Stdenv; inherit glaze; };
+      biu = pkgs.pkgsStatic.localPackages.biu;
     in pkgs.pkgsStatic.localPackages.hpcstat.override
     {
       inherit openssh duc biu;
diff --git a/packages/biu/include/biu/serialize.hpp b/packages/biu/include/biu/serialize.hpp
index c56ee127..ccadce30 100644
--- a/packages/biu/include/biu/serialize.hpp
+++ b/packages/biu/include/biu/serialize.hpp
@@ -15,10 +15,3 @@ namespace biu
   template <typename T> T deserialize(const std::string& serialized_data);
   template <typename T> T deserialize(const std::vector<std::byte>& serialized_data);
 }
-
-namespace std
-{
-  // TODO: remove at clang19
-  template <typename Complex> constexpr auto serialize(auto & archive, Complex& complex)
-    requires biu::SpecializationOf<std::remove_cvref_t<Complex>, std::complex>;
-}
diff --git a/packages/default.nix b/packages/default.nix
index f57a45cb..675a8b24 100644
--- a/packages/default.nix
+++ b/packages/default.nix
@@ -14,11 +14,7 @@ inputs: rec
   };
   v-sim = inputs.pkgs.callPackage ./v-sim.nix { src = inputs.topInputs.v-sim; };
   concurrencpp = inputs.pkgs.callPackage ./concurrencpp.nix { src = inputs.topInputs.concurrencpp; };
-  matplotplusplus = inputs.pkgs.callPackage ./matplotplusplus.nix
-  {
-    src = inputs.topInputs.matplotplusplus;
-    stdenv = inputs.pkgs.clang18Stdenv;
-  };
+  matplotplusplus = inputs.pkgs.callPackage ./matplotplusplus.nix { src = inputs.topInputs.matplotplusplus; };
   zpp-bits = inputs.pkgs.callPackage ./zpp-bits.nix { src = inputs.topInputs.zpp-bits; };
   nameof = inputs.pkgs.callPackage ./nameof.nix { src = inputs.topInputs.nameof; };
   pslist = inputs.pkgs.callPackage ./pslist.nix { src = inputs.topInputs.self.src.pslist; };
@@ -67,7 +63,6 @@ inputs: rec
     inherit nameof zpp-bits tgbot-cpp concurrencpp pocketfft;
     # TODO: report glaze bug to upstream
     inherit (inputs.pkgs.pkgs-2411) glaze;
-    stdenv = inputs.pkgs.clang18Stdenv;
     boost = (inputs.pkgs.boost188.override { extraB2Args = [ "boost.stacktrace.backtrace=on" ]; }).overrideAttrs
       (prev: { buildInputs = prev.buildInputs ++ [(inputs.pkgs.libbacktrace.override { enableStatic = true; })]; });
     fmt = inputs.pkgs.fmt_11.overrideAttrs (prev: { patches = prev.patches or [] ++ [ ./biu/fmt.patch ]; });
@@ -77,12 +72,11 @@ inputs: rec
   openxlsx = inputs.pkgs.callPackage ./openxlsx.nix { src = inputs.topInputs.openxlsx; };
   sqlite-orm = inputs.pkgs.callPackage ./sqlite-orm.nix { src = inputs.topInputs.sqlite-orm; };
   mkPnpmPackage = inputs.pkgs.callPackage ./mkPnpmPackage.nix {};
-  sbatch-tui = inputs.pkgs.callPackage ./sbatch-tui { inherit biu; stdenv = inputs.pkgs.clang18Stdenv; };
+  sbatch-tui = inputs.pkgs.callPackage ./sbatch-tui { inherit biu; };
   ufo = inputs.pkgs.callPackage inputs.topInputs.ufo
   {
     inherit biu matplotplusplus;
     tbb = inputs.pkgs.tbb_2022;
-    stdenv = inputs.pkgs.clang18Stdenv;
   };
   chn-bsub = inputs.pkgs.callPackage ./chn-bsub { inherit biu; };
   py4vasp = inputs.pkgs.python3Packages.callPackage ./py4vasp.nix { src = inputs.topInputs.py4vasp; };
@@ -112,14 +106,14 @@ inputs: rec
     ];
   };
   stickerpicker = inputs.pkgs.python3Packages.callPackage ./stickerpicker.nix { src = inputs.topInputs.stickerpicker; };
-  info = inputs.pkgs.callPackage ./info { inherit biu; stdenv = inputs.pkgs.clang18Stdenv; };
+  info = inputs.pkgs.callPackage ./info { inherit biu; };
   blog = inputs.pkgs.callPackage inputs.topInputs.blog
   {
     inherit (inputs.topInputs) hextra;
     buildProxy = inputs.pkgs.lib.mkBuildproxy ./blog-buildproxy.nix;
   };
   phono3py = inputs.pkgs.python3Packages.callPackage ./phono3py.nix { src = inputs.topInputs.phono3py; };
-  vm = inputs.pkgs.callPackage ./vm { inherit biu; stdenv = inputs.pkgs.clang18Stdenv; };
+  vm = inputs.pkgs.callPackage ./vm { inherit biu; };
   oneapiPackages = inputs.pkgs.lib.makeScope inputs.pkgs.newScope (final:
   {
     stdenv = inputs.pkgs.callPackage ./oneapi/stdenv.nix { src = inputs.topInputs.self.src.oneapi; inherit gccFull; };
@@ -137,14 +131,14 @@ inputs: rec
   speedtest = inputs.pkgs.callPackage ./speedtest.nix { src = inputs.topInputs.speedtest; };
   atat = inputs.pkgs.callPackage ./atat.nix { src = inputs.topInputs.self.src.atat; };
   atomkit = inputs.pkgs.callPackage ./atomkit.nix { src = inputs.topInputs.self.src.atomkit; };
-  xinli = inputs.pkgs.callPackage ./xinli { inherit biu; stdenv = inputs.pkgs.clang18Stdenv; };
+  xinli = inputs.pkgs.callPackage ./xinli { inherit biu; };
   pybinding = inputs.pkgs.pkgs-2411.python310Packages.callPackage ./pybinding
   {
     src = inputs.topInputs.pybinding;
     buildProxy = inputs.pkgs.lib.mkBuildproxy ./pybinding/proxy.nix;
   };
   brokenaxes = inputs.pkgs.python3Packages.callPackage ./brokenaxes.nix { src = inputs.topInputs.brokenaxes; };
-  missgram = inputs.pkgs.callPackage ./missgram { inherit biu sqlgen; stdenv = inputs.pkgs.clang18Stdenv; };
+  missgram = inputs.pkgs.callPackage ./missgram { inherit biu sqlgen; };
   sqlgen = inputs.pkgs.callPackage ./sqlgen.nix { src = inputs.topInputs.sqlgen; inherit reflectcpp; };
   reflectcpp = inputs.pkgs.callPackage ./reflectcpp.nix { src = inputs.topInputs.reflectcpp; };
   lsf = inputs.pkgs.callPackage ./lsf.nix { src = inputs.topInputs.self.src.lsf; };