diff --git a/base/platforms/t14/default.nix b/base/platforms/t14/default.nix
index 2e17337..f34b541 100644
--- a/base/platforms/t14/default.nix
+++ b/base/platforms/t14/default.nix
@@ -25,24 +25,34 @@
 
   hardware.opengl.enable = true;
 
-  # esto es de la FGPA, eliminar cuando termine el curso
-  services.udev.extraRules = ''
-    # USB-Blaster
-    ATTRS{idVendor}=="09fb", ATTRS{idProduct}=="6001", MODE="660", GROUP="dialout", TAG+="uaccess"
-    ATTRS{idVendor}=="09fb", ATTRS{idProduct}=="6002", MODE="660", GROUP="dialout", TAG+="uaccess"
-    ATTRS{idVendor}=="09fb", ATTRS{idProduct}=="6003", MODE="660", GROUP="dialout", TAG+="uaccess"
+  hardware.pulseaudio = {
+    enable = true;
+    package = pkgs.pulseaudioFull;
+  };
 
-    # USB-Blaster II
-    ATTRS{idVendor}=="09fb", ATTRS{idProduct}=="6010", MODE="660", GROUP="dialout", TAG+="uaccess"
-    ATTRS{idVendor}=="09fb", ATTRS{idProduct}=="6810", MODE="660", GROUP="dialout", TAG+="uaccess"
-  '';
+  hardware.bluetooth.enable = true;
+  hardware.bluetooth.settings = {
+  General = {
+    Enable = "Source,Sink,Media,Socket";
+  };
+};
 
   services = {
     fwupd.enable = true;
     thinkfan.enable = true;
     tlp.enable = true;
-    tp-auto-kbbl.enable =true;
+    tp-auto-kbbl.enable = true;
+    blueman.enable = true;
   };
 
+  services = {
+    pcscd.enable = true;
+    udev.packages = [ pkgs.yubikey-personalization ];
+  };
+
+  environment.etc."pkcs11/modules/ykcs11".text = ''
+    module: ${pkgs.yubico-piv-tool}/lib/libykcs11.so
+  '';
+
 }
 
diff --git a/flake.lock b/flake.lock
index 91e9f96..6ce12e8 100644
--- a/flake.lock
+++ b/flake.lock
@@ -34,20 +34,19 @@
       "inputs": {
         "nixpkgs": [
           "nixpkgs"
-        ],
-        "utils": "utils"
+        ]
       },
       "locked": {
-        "lastModified": 1679067101,
-        "narHash": "sha256-tMI1inGT9u4KWQml0w30dhWqQPlth1e9K/68sfDkEQA=",
+        "lastModified": 1712386041,
+        "narHash": "sha256-dA82pOMQNnCJMAsPG7AXG35VmCSMZsJHTFlTHizpKWQ=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "9154cd519a8942728038819682d6b3ff33f321bb",
+        "rev": "d6bb9f934f2870e5cbc5b94c79e9db22246141ff",
         "type": "github"
       },
       "original": {
         "owner": "nix-community",
-        "ref": "release-22.11",
+        "ref": "release-23.11",
         "repo": "home-manager",
         "type": "github"
       }
@@ -88,16 +87,16 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1679318992,
-        "narHash": "sha256-uoj5Oy6hruIHuxzfQZtcalObe5kPrX9v+ClUMFEOzmE=",
+        "lastModified": 1712310679,
+        "narHash": "sha256-XgC/a/giEeNkhme/AV1ToipoZ/IVm1MV2ntiK4Tm+pw=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "e2c97799da5f5cd87adfa5017fba971771e123ef",
+        "rev": "72da83d9515b43550436891f538ff41d68eecc7f",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-22.11",
+        "ref": "nixos-23.11",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -142,21 +141,6 @@
         "repo": "nixpkgs",
         "type": "github"
       }
-    },
-    "utils": {
-      "locked": {
-        "lastModified": 1667395993,
-        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index fa62f9d..9a1cda6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,13 +1,13 @@
 {
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-22.11"; # actualizar esto para actualizar
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.11"; # actualizar esto para actualizar
     unstable.url = "github:nixos/nixpkgs/master";
     nur.url = "github:nix-community/NUR";
     hm-isolation.url = "github:3442/hm-isolation";
     nixGL.url = "github:guibou/nixGL";
 
     home-manager = {
-      url = "github:nix-community/home-manager/release-22.11";  # actualizar esto para actualizar
+      url = "github:nix-community/home-manager/release-23.11";  # actualizar esto para actualizar
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
diff --git a/home/allowUnfreeWhitelist.nix b/home/allowUnfreeWhitelist.nix
index 2988e39..3cf7571 100644
--- a/home/allowUnfreeWhitelist.nix
+++ b/home/allowUnfreeWhitelist.nix
@@ -11,8 +11,6 @@ with lib;
     "steam"
     "steam-original"
     "steam-run"
-    "teams"
-    "unrar"
     "vscode-extension-ms-vscode-cpptools"
     "vmware-horizon-client"
     "zoom"
diff --git a/home/apps/messaging.nix b/home/apps/messaging.nix
index b1f2178..caaa489 100644
--- a/home/apps/messaging.nix
+++ b/home/apps/messaging.nix
@@ -7,12 +7,7 @@ in
   options.local.apps.messaging.enable = mkEnableOption "Messaging apps";
   config = mkIf cfg.enable {
     home.packages = with pkgs; [
-      discord
-      signal-desktop
-      tdesktop
-      teams
       thunderbird
-      zoom-us
     ];
   };
 }
diff --git a/home/apps/multimedia.nix b/home/apps/multimedia.nix
index df0d3fe..7219167 100644
--- a/home/apps/multimedia.nix
+++ b/home/apps/multimedia.nix
@@ -8,6 +8,9 @@ in
   config = mkIf cfg.enable {
     home.packages = with pkgs; [
       deluge
+      lapce
+      ledfx
+      jack2
       mpv
       obs-studio
       pavucontrol
diff --git a/home/cli.nix b/home/cli.nix
index 129ba50..67d452d 100644
--- a/home/cli.nix
+++ b/home/cli.nix
@@ -4,7 +4,7 @@ with lib;
   programs = {
     zsh = { 
       enable = true;
-      enableSyntaxHighlighting = true;
+      syntaxHighlighting.enable = true;
       initExtra = import ./zshrc.nix pkgs;
     };
     git = {
@@ -12,6 +12,61 @@ with lib;
       userEmail = "fabian@cluster451.org";
       userName = "Fabián Montero";
       signing.key = "E77A808BF9A955D668EEEA6473FA9C9CB5F0249B";
+      extraConfig.init.defaultBranch = "main";
+    };
+    helix = {
+      enable = true;
+      settings = {
+        # theme = "onedark";
+        editor = {
+          mouse = true;
+          line-number = "absolute";
+          cursorline = true;
+          cursorcolumn = true;
+          gutters = [ "diagnostics" "spacer" "line-numbers" "diff" ];
+          auto-completion =  true;
+          auto-format = true;
+          auto-save = true;
+          bufferline = "multiple";
+          rulers = [ 80 ];
+          true-color = true;
+          lsp.display-messages = true;
+          auto-pairs = false;
+          whitespace = {
+            render = {
+              space = "all";
+              nbsp = "all";
+              tab = "all";
+              newline = "none";
+            };
+
+          };
+          indent-guides = {
+            character = "╎";
+            render = true;
+          };
+          cursor-shape = {
+            select = "block";
+            insert = "block";
+            normal = "block";
+          };
+          statusline = {
+            left = [ "mode" "spinner" "version-control" "file-name" "file-modification-indicator" "total-line-numbers" ];
+          };
+          file-picker = {
+            hidden = false;
+            follow-symlinks = false;
+            deduplicate-links = false;
+
+          };
+        };
+        keys.normal = {
+          space.space = "file_picker";
+          space.w = ":w";
+          space.q = ":q";
+          esc = [ "collapse_selection" "keep_primary_selection" ];
+        };
+      };
     };
   };
   
@@ -27,7 +82,6 @@ with lib;
     rar
     tree
     units
-    unrar
     unzip
     usbutils
     zip
diff --git a/home/default.nix b/home/default.nix
index 7459784..fe4fe6c 100644
--- a/home/default.nix
+++ b/home/default.nix
@@ -39,6 +39,12 @@ with lib;
     "unstable".flake = unstable;
   };
 
+  services.gpg-agent = {
+    enable = true;
+    enableZshIntegration = true;
+    pinentryFlavor = "gtk2";
+  };
+
   programs.home-manager.enable = true;
 
   xdg = {
diff --git a/home/gui/default.nix b/home/gui/default.nix
index 3585b1b..c308578 100644
--- a/home/gui/default.nix
+++ b/home/gui/default.nix
@@ -41,6 +41,7 @@ in
     
       betterlockscreen = {
         enable = true;
+	inactiveInterval = 60;
       };
     };
 
diff --git a/home/gui/i3.nix b/home/gui/i3.nix
index 7f21107..d165447 100644
--- a/home/gui/i3.nix
+++ b/home/gui/i3.nix
@@ -69,9 +69,6 @@ in
           {
             command = "${pkgs.i3-gaps}/bin/i3-msg 'workspace 1; exec ${pkgs.firefox}/bin/firefox'";
           }
-          {
-            command = "${pkgs.i3-gaps}/bin/i3-msg 'workspace 2; exec ${pkgs.tdesktop}/bin/telegram-desktop'";
-          }
           {
             command = "${pkgs.i3-gaps}/bin/i3-msg 'workspace 2; exec ${pkgs.signal-desktop}/bin/signal-desktop'";
           }
diff --git a/home/platforms/t14.nix b/home/platforms/t14.nix
index 791e674..f075ada 100644
--- a/home/platforms/t14.nix
+++ b/home/platforms/t14.nix
@@ -2,6 +2,10 @@
   config.local = {
     nixos = true;
 
+    apps = {
+      steam.enable = true;
+    };
+
     display = {
       "0" = "eDP-1";
       "1" = null;
diff --git a/home/shenvs/altera.nix b/home/shenvs/altera.nix
deleted file mode 100644
index d780db3..0000000
--- a/home/shenvs/altera.nix
+++ /dev/null
@@ -1,83 +0,0 @@
-{ lib, pkgs, ... }:
-with lib; {
-  static = false; # !!!!
-  namespaced = true;
-
-  packages = with pkgs; [
-    (quartus-prime-lite.override { supportedDevices = [ "Cyclone V" ]; })
-    binutils
-    gcc
-    gnumake
-    gtkwave
-    verilator
-  ];
-
-  hm = {
-    # QGtkStyle could not resolve GTK. Make sure you have installed the proper libraries.
-    home.sessionVariables.LD_LIBRARY_PATH = "${pkgs.gtk2}/lib";
-
-    # Evita GC
-    xdg.configFile."quartus-inputs".text = let
-      inherit (pkgs) requireFile;
-      homepage = "https://fpgasoftware.intel.com";
-      version = "20.1.1.720";
-      url = "${homepage}/${versions.majorMinor version}/?edition=lite&platform=linux";
-
-      inputs = [
-        (requireFile {
-          name = "QuartusLiteSetup-${version}-linux.run";
-          sha256 = "0mjp1rg312dipr7q95pb4nf4b8fwvxgflnd1vafi3g9cshbb1c3k";
-          inherit url;
-        })
-
-        (requireFile {
-          name = "ModelSimSetup-${version}-linux.run";
-          sha256 = "1cqgv8x6vqga8s4v19yhmgrr886rb6p7sbx80528df5n4rpr2k4i";
-          inherit url;
-        })
-
-        (requireFile {
-          name = "cyclonev-${version}.qdz";
-          sha256 = "11baa9zpmmfkmyv33w1r57ipf490gnd3dpi2daripf38wld8lgak";
-          inherit url;
-        })
-      ];
-    in concatStringsSep "\n" inputs;
-
-
-    # dice soto que ponga esto globalmente si quiero nightmode en todo
-    # Usar gtk en aplicaciones de jvm
-    home.sessionVariables._JAVA_OPTIONS = concatStringsSep " " [
-      "-Dawt.useSystemAAFontSettings=on"
-      "-Dswing.aatext=true"
-      "-Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel"
-      "-Dswing.crossplatformlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel"
-    ];
-
-    gtk = {
-      enable = true;
-
-      gtk2.extraConfig = ''
-        gtk-toolbar-style=GTK_TOOLBAR_BOTH_HORIZ
-        gtk-menu-images=1
-        gtk-button-images=1
-      '';
-
-      font = {
-        package = pkgs.noto-fonts;
-        name = "Noto Sans Regular";
-        #size = 14; <- caga layout de páginas
-      };
-
-      theme = {
-        package = pkgs.materia-theme;
-        name = "Materia-dark";
-      };
-    };
-
-    qt = {
-      enable = true;
-      platformTheme = "gtk";
-    };
-  };
-}
diff --git a/home/shenvs/c.nix b/home/shenvs/c.nix
index e426d59..02df9e8 100644
--- a/home/shenvs/c.nix
+++ b/home/shenvs/c.nix
@@ -5,12 +5,12 @@
   packages = with pkgs; [
     binutils
     cmake
-    gdb
-    gcc-arm-embedded
+    #gdb
+    #gcc-arm-embedded
     gnumake
-    lldb
-    openocd
-    qemu
-    valgrind
+    #lldb
+    #openocd
+    #qemu
+    #valgrind
   ];
 }
diff --git a/home/shenvs/octave.nix b/home/shenvs/octave.nix
deleted file mode 100644
index 75d135a..0000000
--- a/home/shenvs/octave.nix
+++ /dev/null
@@ -1,18 +0,0 @@
-{pkgs, ...}:
-{
-  static = true;
-  
-  packages = with pkgs; [
-    (octave.withPackages (packages: with packages; [
-    	symbolic
-      signal
-    ]))
-    (python39.withPackages (packages: with packages; [
-      numpy
-      pipenv
-	    scipy
-	    sympy
-	    matplotlib
-    ]))
-  ];
-}
diff --git a/home/shenvs/python.nix b/home/shenvs/python.nix
index 83a5f81..53d0325 100644
--- a/home/shenvs/python.nix
+++ b/home/shenvs/python.nix
@@ -5,12 +5,7 @@
   packages = with pkgs; [
     pipenv
     (python310.withPackages ( packages: with packages; [
-        matplotlib
-        numpy
-        pandas
         requests
-        scipy
-        setuptools
     ]))
   ];
 }
diff --git a/home/shenvs/tex.nix b/home/shenvs/tex.nix
deleted file mode 100644
index ba89df8..0000000
--- a/home/shenvs/tex.nix
+++ /dev/null
@@ -1,22 +0,0 @@
-{ pkgs, ... }:
-{
-  static = true;
-
-  packages = with pkgs; [
-    biber
-    (texlive.combine {
-      inherit (texlive)
-        appendix
-        scheme-medium
-        biblatex
-        biblatex-ieee
-        cleveref
-        csquotes
-        enumitem
-        ieeetran
-        titlesec
-        titling
-        zref;
-    })
-  ];
-}
\ No newline at end of file
diff --git a/home/systemd/default.nix b/home/systemd/default.nix
index bd3dda7..767e9cb 100644
--- a/home/systemd/default.nix
+++ b/home/systemd/default.nix
@@ -4,4 +4,11 @@ with lib;
   systemd.user.tmpfiles.rules = [
     "d %t/tmp 0700 fabian fabian 24h"
   ];
+
+  systemd.user.services.mpris-proxy = {
+    Unit.Description = "Mpris proxy";
+    Unit.After = [ "network.target" "sound.target" ];
+    Service.ExecStart = "${pkgs.bluez}/bin/mpris-proxy";
+    Install.WantedBy = [ "default.target" ];
+  };
 }
diff --git a/pkgs/default.nix b/pkgs/default.nix
index f323efe..f05a20f 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -1,5 +1,4 @@
 pkgs:
 {
-  #andesight = pkgs.callPackage ./andesight {};
-  #netextender = pkgs.callPackage ./netextender {};
+  simplescalar = pkgs.callPackage ./simple-scalar {};
 }
diff --git a/pkgs/simple-scalar/0001-fix-case-of-YY_CURRENT_BUFFER.patch b/pkgs/simple-scalar/0001-fix-case-of-YY_CURRENT_BUFFER.patch
new file mode 100644
index 0000000..5d7cf85
--- /dev/null
+++ b/pkgs/simple-scalar/0001-fix-case-of-YY_CURRENT_BUFFER.patch
@@ -0,0 +1,25 @@
+From 33f6fb023c09464467eea4538f18e2a131acee3a Mon Sep 17 00:00:00 2001
+From: Alejandro Soto <alejandro@34project.org>
+Date: Wed, 26 Apr 2023 13:37:32 -0600
+Subject: [PATCH] fix case of YY_CURRENT_BUFFER
+
+---
+ ld/ldlex.l | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/simpleutils-990811/ld/ldlex.l b/simpleutils-990811/ld/ldlex.l
+index 2eef80f..561b8af 100644
+--- a/simpleutils-990811/ld/ldlex.l
++++ b/simpleutils-990811/ld/ldlex.l
+@@ -585,7 +585,7 @@ yy_input (buf, result, max_size)
+      int max_size;
+ {
+   *result = 0; 
+-  if (yy_current_buffer->yy_input_file)
++  if (YY_CURRENT_BUFFER->yy_input_file)
+     {
+       if (yyin)
+ 	{
+-- 
+2.38.4
+
diff --git a/pkgs/simple-scalar/0002-define-sys_nerr.patch b/pkgs/simple-scalar/0002-define-sys_nerr.patch
new file mode 100644
index 0000000..021d157
--- /dev/null
+++ b/pkgs/simple-scalar/0002-define-sys_nerr.patch
@@ -0,0 +1,24 @@
+From 442edcc1d281a62a0092bcde19038ba3c976e499 Mon Sep 17 00:00:00 2001
+From: Alejandro Soto <alejandro@34project.org>
+Date: Wed, 26 Apr 2023 13:35:21 -0600
+Subject: [PATCH 1/3] define sys_nerr
+
+---
+ gcc.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/gcc-2.7.2.3/gcc.c b/gcc-2.7.2.3/gcc.c
+index fe7de5b..1ac933f 100644
+--- a/gcc-2.7.2.3/gcc.c
++++ b/gcc-2.7.2.3/gcc.c
+@@ -176,6 +176,7 @@ extern int errno;
+ #endif
+ 
+ extern int sys_nerr;
++int __attribute__((weak)) sys_nerr = 0;
+ #ifndef HAVE_STRERROR
+ #if defined(bsd4_4)
+ extern const char *const sys_errlist[];
+-- 
+2.38.4
+
diff --git a/pkgs/simple-scalar/0003-fix-obstack.h-post-increment.patch b/pkgs/simple-scalar/0003-fix-obstack.h-post-increment.patch
new file mode 100644
index 0000000..8e38a80
--- /dev/null
+++ b/pkgs/simple-scalar/0003-fix-obstack.h-post-increment.patch
@@ -0,0 +1,25 @@
+From b074acb822459a42d2507ad5729e9e60bb1de572 Mon Sep 17 00:00:00 2001
+From: Alejandro Soto <alejandro@34project.org>
+Date: Wed, 26 Apr 2023 13:35:42 -0600
+Subject: [PATCH 2/3] fix obstack.h post-increment
+
+---
+ obstack.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/gcc-2.7.2.3/obstack.h b/gcc-2.7.2.3/obstack.h
+index 28bcd44..3a517b5 100644
+--- a/gcc-2.7.2.3/obstack.h
++++ b/gcc-2.7.2.3/obstack.h
+@@ -338,7 +338,7 @@ __extension__								\
+    if (__o->next_free + sizeof (void *) > __o->chunk_limit)		\
+      _obstack_newchunk (__o, sizeof (void *));				\
+    if (!__o->alloc_failed)						\
+-     *((void **)__o->next_free)++ = ((void *)datum);			\
++     *((void **)__o->next_free++) = ((void *)datum);			\
+    (void) 0; })
+ 
+ #define obstack_int_grow(OBSTACK,datum)					\
+-- 
+2.38.4
+
diff --git a/pkgs/simple-scalar/0004-stdarg.h-instead-of-varargs.h.patch b/pkgs/simple-scalar/0004-stdarg.h-instead-of-varargs.h.patch
new file mode 100644
index 0000000..5e8fc7b
--- /dev/null
+++ b/pkgs/simple-scalar/0004-stdarg.h-instead-of-varargs.h.patch
@@ -0,0 +1,25 @@
+From 12c34c7ff8e4e00ba54bd0b90f2ca6905109cb5d Mon Sep 17 00:00:00 2001
+From: Alejandro Soto <alejandro@34project.org>
+Date: Wed, 26 Apr 2023 13:35:57 -0600
+Subject: [PATCH 3/3] stdarg.h instead of varargs.h
+
+---
+ protoize.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/gcc-2.7.2.3/protoize.c b/gcc-2.7.2.3/protoize.c
+index 9728bf2..fb82ef0 100644
+--- a/gcc-2.7.2.3/protoize.c
++++ b/gcc-2.7.2.3/protoize.c
+@@ -57,7 +57,7 @@ Boston, MA 02111-1307, USA.  */
+ #define _POSIX_SOURCE
+ #endif
+ 
+-#include <varargs.h>
++#include <stdarg.h>
+ /* On some systems stdio.h includes stdarg.h;
+    we must bring in varargs.h first.  */
+ #include <stdio.h>
+-- 
+2.38.4
+
diff --git a/pkgs/simple-scalar/default.nix b/pkgs/simple-scalar/default.nix
new file mode 100644
index 0000000..ce64e51
--- /dev/null
+++ b/pkgs/simple-scalar/default.nix
@@ -0,0 +1,118 @@
+# https://www.cse.iitd.ac.in/~cs5070217/csl718/assignment1/ss_install_instructions.html
+{ bison, fetchurl, flex, multiStdenv, stdenv_32bit, strace }:
+let
+  host = "i686-pc-linux";
+  target = "sslittle-na-sstrix";
+
+  gcc-version = "2.7.2.3";
+  makeflags = "LANGUAGES=c CC=\"$CC -m32 $CFLAGS\" prefix=$out";
+in
+multiStdenv.mkDerivation {
+  pname = "SimpleScalar";
+  version = "1998-08-11"; # !!!
+
+  nativeBuildInputs = [ flex bison ];
+
+  sourceRoot = ".";
+
+  srcs = [
+    (fetchTarball {
+      name = "simplesim-3.0";
+
+      url = "https://www.cse.iitd.ac.in/~cs5070217/csl718/simplesim-3v0d.tgz";
+      sha256 = "sha256:022rlniimzl30c1874765hl001dxc716vfwm40ij256h1qk2dwgw";
+    })
+
+    (fetchTarball {
+      name = "simpleutils-990811";
+
+      url = "https://www.cse.iitd.ac.in/~cs5070217/csl718/simpleutils-990811.tar.gz";
+      sha256 = "sha256:0w952z382s7ghrxwrad7fd058b1kj5ad1abh8idxwwk47va72cdf";
+    })
+  ];
+
+  # El código es muy viejo y Nix usa opciones muy estrictas por defecto
+  CFLAGS = "-O3 -Wno-error=format-security";
+
+  # Algunas tarballs vienen sin directorio de primer nivel y además requieren arreglos
+  postUnpack =
+    let
+      simpletools = fetchurl {
+        url = "https://www.cse.iitd.ac.in/~cs5070217/csl718/simpletools-2v0.tgz";
+        sha256 = "sha256-FTDTqyQWZCnuNPmTcu3Hcjgp4pHNoUcC0GOGhSJV9Iw=";
+      };
+
+      gcc-ss = fetchurl {
+        url = "https://www.cse.iitd.ac.in/~cs5070217/csl718/gcc-${gcc-version}.ss.tar.gz";
+        sha256 = "sha256-3R3wsLmxoN3MkEW4gaxnhIyTBs0CUiSiH7C1/hF2atM=";
+      };
+
+      ar-and-ranlib = fetchurl {
+        url = "https://www.cse.iitd.ac.in/~cs5070217/csl718/ar_and_ranlib.tar.gz";
+        sha256 = "sha256-MRTO6cAg3WeXlk3jDy2lVuiSXDRz1+LLa2XDkBDygMU=";
+      };
+    in
+    ''
+      tar xf ${simpletools}
+      rm -r gcc-2.6.3
+
+      tar xf ${gcc-ss}
+
+      mkdir ar-and-ranlib
+      tar xf ${ar-and-ranlib} -C ar-and-ranlib
+
+      chmod -R +w gcc-${gcc-version} ar-and-ranlib
+    '';
+
+  patches = [
+    ./0001-fix-case-of-YY_CURRENT_BUFFER.patch
+    ./0002-define-sys_nerr.patch
+    ./0003-fix-obstack.h-post-increment.patch
+    ./0004-stdarg.h-instead-of-varargs.h.patch
+  ];
+
+  postPatch = ''
+    patchelf \
+      --set-interpreter "$(<${stdenv_32bit.cc}/nix-support/dynamic-linker-m32)" \
+      ar-and-ranlib/{ar,ranlib}
+  '';
+
+  configurePhase = ''
+    BUILD=$PWD
+
+    cd $BUILD/simplesim-3.0
+    make config-pisa
+
+    cd $BUILD/simpleutils-990811
+    ./configure --host=${host} --target=${target} --with-gnu-as --with-gnu-ld --prefix=$out
+
+    cd $BUILD/gcc-${gcc-version}
+    ./configure --host=${host} --target=${target} --with-gnu-as --with-gnu-ld --prefix=$out
+  '';
+
+  buildPhase = ''
+    make -C $BUILD/simplesim-3.0
+    make -C $BUILD/simpleutils-990811
+
+    # GCC necesita binutils para compilar
+    make -C $BUILD/simpleutils-990811 install
+    cp $BUILD/ar-and-ranlib/{ar,ranlib} $out/${target}/bin/
+
+    cd $BUILD/gcc-${gcc-version}
+
+    mkdir -p $out/lib
+    cp patched/sys/cdefs.h $BUILD/${target}/include/sys/cdefs.h
+    cp -r $BUILD/${target} $out/
+    cp $BUILD/${target}/lib/{libc.a,crt0.o} $out/lib/
+    sed -i '130s@-I/usr/include@-I./include@' Makefile
+
+    ! make ${makeflags}
+    sed -i 's/\(return "FIXME\\n\)/\1\\/g' insn-output.c
+    PATH="$out/${target}/bin:$PATH" make ${makeflags}
+  '';
+
+  installPhase = ''
+    cp $BUILD/simplesim-3.0/{sim-{outorder,cache,profile,bpred,eio,safe,fast},sysprobe} $out/bin/
+    PATH="$out/${target}/bin:$PATH" make -C $BUILD/gcc-${gcc-version} ${makeflags} install
+  '';
+}