diff --git a/foundation/src/builders/bash/default.nix b/foundation/src/builders/bash/default.nix
index 1909ea0..58646fb 100644
--- a/foundation/src/builders/bash/default.nix
+++ b/foundation/src/builders/bash/default.nix
@@ -5,18 +5,75 @@
   system = config.aux.system;
   builders = config.aux.foundation.builders;
 
-  stage0 = config.aux.foundation.stages.stage0;
+  stage1 = config.aux.foundation.stages.stage1;
 in {
   includes = [
     ./boot.nix
   ];
 
   options.aux.foundation.builders.bash = {
-    # TODO: Bash builder that isn't boot.
+    build = lib.options.create {
+      type = lib.types.function lib.types.package;
+      description = "Builds a package using the kaem builder.";
+    };
   };
 
   config = {
     aux.foundation.builders.bash = {
+      build = lib.modules.overrides.default (settings @ {
+        name,
+        script,
+        meta ? {},
+        extras ? {},
+        env ? {},
+        deps ? {},
+        ...
+      }: let
+        package = builtins.derivation (
+          (builtins.removeAttrs settings ["meta" "extras" "executable" "env" "deps" "script"])
+          // env
+          // {
+            inherit name system script;
+
+            passAsFile = ["script"];
+
+            builder = "${stage1.bash.package}/bin/bash";
+
+            args = [
+              "-e"
+              (builtins.toFile "bash-builder.sh" ''
+                export CONFIG_SHELL=$SHELL
+
+                # Normalize the NIX_BUILD_CORES variable. The value might be 0, which
+                # means that we're supposed to try and auto-detect the number of
+                # available CPU cores at run-time.
+                NIX_BUILD_CORES="''${NIX_BUILD_CORES:-1}"
+                if ((NIX_BUILD_CORES <= 0)); then
+                  guess=$(nproc 2>/dev/null || true)
+                  ((NIX_BUILD_CORES = guess <= 0 ? 1 : guess))
+                fi
+                export NIX_BUILD_CORES
+
+                bash -eux $scriptPath
+              '')
+            ];
+
+            SHELL = "${stage1.bash.package}/bin/bash";
+
+            PATH = lib.paths.bin (
+              (deps.build.host or [])
+              ++ [
+                stage1.bash.package
+                stage1.coreutils.package
+              ]
+            );
+          }
+        );
+      in
+        package
+        // {
+          inherit meta extras;
+        });
     };
   };
 }
diff --git a/foundation/src/stages/stage1/bash/default.nix b/foundation/src/stages/stage1/bash/default.nix
index 4759d02..4f9f3d3 100644
--- a/foundation/src/stages/stage1/bash/default.nix
+++ b/foundation/src/stages/stage1/bash/default.nix
@@ -4,6 +4,7 @@
 }: let
   cfg = config.aux.foundation.stages.stage1.bash;
 
+  platform = config.aux.platform;
   builders = config.aux.foundation.builders;
 
   stage1 = config.aux.foundation.stages.stage1;
@@ -13,6 +14,21 @@ in {
   ];
 
   options.aux.foundation.stages.stage1.bash = {
+    package = lib.options.create {
+      type = lib.types.package;
+      description = "The package to use for gnumake.";
+    };
+
+    version = lib.options.create {
+      type = lib.types.string;
+      description = "Version of the package.";
+    };
+
+    src = lib.options.create {
+      type = lib.types.package;
+      description = "Source for the package.";
+    };
+
     meta = {
       description = lib.options.create {
         type = lib.types.string;
@@ -38,6 +54,74 @@ in {
         description = "Platforms the package supports.";
         default.value = ["x86_64-linux" "aarch64-linux" "i686-linux"];
       };
+
+      mainProgram = lib.options.create {
+        type = lib.types.string;
+        description = "The main program of the package.";
+        default.value = "bash";
+      };
+    };
+  };
+
+  config = {
+    aux.foundation.stages.stage1.bash = {
+      version = "5.2.15";
+
+      src = builtins.fetchurl {
+        url = "https://ftpmirror.gnu.org/bash/bash-${cfg.version}.tar.gz";
+        sha256 = "132qng0jy600mv1fs95ylnlisx2wavkkgpb19c6kmz7lnmjhjwhk";
+      };
+
+      package = let
+        patches = [
+          # flush output for generated code
+          ./patches/mksignames-flush.patch
+        ];
+      in
+        builders.bash.boot.build {
+          name = "bash-${cfg.version}";
+
+          meta = cfg.meta;
+
+          deps.build.host = [
+            stage1.tinycc.musl.compiler.package
+            stage1.coreutils.package
+            stage1.gnumake.package
+            stage1.gnupatch.package
+            stage1.gnused.package
+            stage1.gnugrep.package
+            stage1.gnutar.package
+            stage1.gawk.boot.package
+            stage1.gzip.package
+            stage1.diffutils.package
+          ];
+
+          script = ''
+            # Unpack
+            tar xzf ${cfg.src}
+            cd bash-${cfg.version}
+
+            # Patch
+            ${lib.strings.concatMapSep "\n" (file: "patch -Np1 -i ${file}") patches}
+
+            # Configure
+            export CC="tcc -B ${stage1.tinycc.musl.libs.package}/lib"
+            export AR="tcc -ar"
+            export LD=tcc
+            bash ./configure \
+              --prefix=$out \
+              --build=${platform.build} \
+              --host=${platform.host} \
+              --without-bash-malloc
+
+            # Build
+            make -j $NIX_BUILD_CORES SHELL=bash
+
+            # Install
+            make -j $NIX_BUILD_CORES install
+            ln -s bash $out/bin/sh
+          '';
+        };
     };
   };
 }
diff --git a/foundation/src/stages/stage1/bash/patches/mksignames-flush.patch b/foundation/src/stages/stage1/bash/patches/mksignames-flush.patch
new file mode 100644
index 0000000..0b0dfe7
--- /dev/null
+++ b/foundation/src/stages/stage1/bash/patches/mksignames-flush.patch
@@ -0,0 +1,11 @@
+--- a/support/mksignames.c
++++ b/support/mksignames.c
+@@ -68,6 +68,7 @@ write_signames (stream)
+   fprintf (stream, "};\n\n");
+   fprintf (stream, "#define initialize_signames()\n\n");
+ #endif
++  fflush(stream);
+ }
+ 
+ int
+
diff --git a/foundation/src/stages/stage1/default.nix b/foundation/src/stages/stage1/default.nix
index f455088..792f6d7 100644
--- a/foundation/src/stages/stage1/default.nix
+++ b/foundation/src/stages/stage1/default.nix
@@ -26,6 +26,7 @@ in {
     ./diffutils
     ./binutils
     ./findutils
+    ./gcc
   ];
 
   config = {
@@ -64,6 +65,10 @@ in {
         stage1-coreutils = stage1.coreutils.package;
         stage1-binutils = stage1.binutils.package;
         stage1-findutils = stage1.findutils.package;
+        stage1-bash = stage1.bash.package;
+
+        # These packages are built using Bash v5
+        stage1-gcc-46 = stage1.gcc.v46.package;
       };
 
       extras = {
diff --git a/foundation/src/stages/stage1/gcc/default.nix b/foundation/src/stages/stage1/gcc/default.nix
new file mode 100644
index 0000000..6b6e4be
--- /dev/null
+++ b/foundation/src/stages/stage1/gcc/default.nix
@@ -0,0 +1,44 @@
+{
+  lib,
+  config,
+}: let
+  cfg = config.aux.foundation.stages.stage1.gcc;
+
+  platform = config.aux.platform;
+  builders = config.aux.foundation.builders;
+
+  stage1 = config.aux.foundation.stages.stage1;
+in {
+  includes = [
+    ./v4.6.nix
+  ];
+
+  options.aux.foundation.stages.stage1.gcc = {
+    meta = {
+      description = lib.options.create {
+        type = lib.types.string;
+        description = "Description for the package.";
+        default.value = "GNU Compiler Collection.";
+      };
+
+      homepage = lib.options.create {
+        type = lib.types.string;
+        description = "Homepage for the package.";
+        default.value = "https://gcc.gnu.org";
+      };
+
+      license = lib.options.create {
+        # TODO: Add a proper type for licenses.
+        type = lib.types.attrs.any;
+        description = "License for the package.";
+        default.value = lib.licenses.gpl3Plus;
+      };
+
+      platforms = lib.options.create {
+        type = lib.types.list.of lib.types.string;
+        description = "Platforms the package supports.";
+        default.value = ["i686-linux"];
+      };
+    };
+  };
+}
diff --git a/foundation/src/stages/stage1/gcc/patches/no-system-headers.patch b/foundation/src/stages/stage1/gcc/patches/no-system-headers.patch
new file mode 100644
index 0000000..09801d3
--- /dev/null
+++ b/foundation/src/stages/stage1/gcc/patches/no-system-headers.patch
@@ -0,0 +1,12 @@
+--- a/gcc/Makefile.in
++++ b/gcc/Makefile.in
+@@ -440,7 +440,7 @@ LINKER_PLUGIN_API_H = $(srcdir)/../include/plugin-api.h
+ LTO_SYMTAB_H = $(srcdir)/../include/lto-symtab.h
+ 
+ # Default native SYSTEM_HEADER_DIR, to be overridden by targets.
+-NATIVE_SYSTEM_HEADER_DIR = /usr/include
++# NATIVE_SYSTEM_HEADER_DIR = /usr/include
+ # Default cross SYSTEM_HEADER_DIR, to be overridden by targets.
+ CROSS_SYSTEM_HEADER_DIR = @CROSS_SYSTEM_HEADER_DIR@
+ 
+
diff --git a/foundation/src/stages/stage1/gcc/v4.6.nix b/foundation/src/stages/stage1/gcc/v4.6.nix
new file mode 100644
index 0000000..b81d893
--- /dev/null
+++ b/foundation/src/stages/stage1/gcc/v4.6.nix
@@ -0,0 +1,212 @@
+{
+  lib,
+  config,
+}: let
+  cfg = config.aux.foundation.stages.stage1.gcc.v46;
+
+  platform = config.aux.platform;
+  builders = config.aux.foundation.builders;
+
+  stage1 = config.aux.foundation.stages.stage1;
+in {
+  options.aux.foundation.stages.stage1.gcc.v46 = {
+    package = lib.options.create {
+      type = lib.types.package;
+      description = "The package to use for gcc.";
+    };
+
+    version = lib.options.create {
+      type = lib.types.string;
+      description = "Version of the package.";
+    };
+
+    src = lib.options.create {
+      type = lib.types.package;
+      description = "Source for the package.";
+    };
+
+    cc = {
+      src = lib.options.create {
+        type = lib.types.package;
+        description = "The cc source for the package.";
+      };
+    };
+
+    gmp = {
+      src = lib.options.create {
+        type = lib.types.package;
+        description = "The gmp source for the package.";
+      };
+
+      version = lib.options.create {
+        type = lib.types.string;
+        description = "Version of gmp.";
+      };
+    };
+
+    mpfr = {
+      src = lib.options.create {
+        type = lib.types.package;
+        description = "The mpfr source for the package.";
+      };
+
+      version = lib.options.create {
+        type = lib.types.string;
+        description = "Version of mpfr.";
+      };
+    };
+
+    mpc = {
+      src = lib.options.create {
+        type = lib.types.package;
+        description = "The mpc source for the package.";
+      };
+
+      version = lib.options.create {
+        type = lib.types.string;
+        description = "Version of mpc.";
+      };
+    };
+  };
+
+  config = {
+    aux.foundation.stages.stage1.gcc.v46 = {
+      version = "4.6.4";
+
+      src = builtins.fetchurl {
+        url = "https://ftpmirror.gnu.org/gcc/gcc-${cfg.version}/gcc-core-${cfg.version}.tar.gz";
+        sha256 = "173kdb188qg79pcz073cj9967rs2vzanyjdjyxy9v0xb0p5sad75";
+      };
+
+      cc = {
+        src = builtins.fetchurl {
+          url = "https://ftpmirror.gnu.org/gcc/gcc-${cfg.version}/gcc-g++-${cfg.version}.tar.gz";
+          sha256 = "1fqqk5zkmdg4vmqzdmip9i42q6b82i3f6yc0n86n9021cr7ms2k9";
+        };
+      };
+
+      gmp = {
+        version = "4.3.2";
+
+        src = builtins.fetchurl {
+          url = "https://ftpmirror.gnu.org/gmp/gmp-${cfg.gmp.version}.tar.gz";
+          sha256 = "15rwq54fi3s11izas6g985y9jklm3xprfsmym3v1g6xr84bavqvv";
+        };
+      };
+
+      mpfr = {
+        version = "2.4.2";
+
+        src = builtins.fetchurl {
+          url = "https://ftpmirror.gnu.org/mpfr/mpfr-${cfg.mpfr.version}.tar.gz";
+          sha256 = "0dxn4904dra50xa22hi047lj8kkpr41d6vb9sd4grca880c7wv94";
+        };
+      };
+
+      mpc = {
+        version = "1.0.3";
+
+        src = builtins.fetchurl {
+          url = "https://ftpmirror.gnu.org/mpc/mpc-${cfg.mpc.version}.tar.gz";
+          sha256 = "1hzci2zrrd7v3g1jk35qindq05hbl0bhjcyyisq9z209xb3fqzb1";
+        };
+      };
+
+      package = let
+        patches = [
+          # Remove hardcoded NATIVE_SYSTEM_HEADER_DIR
+          ./patches/no-system-headers.patch
+        ];
+      in
+        builders.bash.build {
+          name = "gcc-${cfg.version}";
+
+          meta = stage1.gcc.meta;
+
+          deps.build.host = [
+            stage1.tinycc.musl.compiler.package
+            stage1.binutils.package
+            stage1.gnumake.boot.package
+            stage1.gnupatch.package
+            stage1.gnused.package
+            stage1.gnugrep.package
+            stage1.gawk.boot.package
+            stage1.diffutils.package
+            stage1.findutils.package
+            stage1.gnutar.musl.package
+            stage1.gzip.package
+          ];
+
+          script = ''
+            # Unpack
+            tar xzf ${cfg.src}
+            tar xzf ${cfg.cc.src}
+            tar xzf ${cfg.gmp.src}
+            tar xzf ${cfg.mpfr.src}
+            tar xzf ${cfg.mpc.src}
+            cd gcc-${cfg.version}
+
+            ln -s ../gmp-${cfg.gmp.version} gmp
+            ln -s ../mpfr-${cfg.mpfr.version} mpfr
+            ln -s ../mpc-${cfg.mpc.version} mpc
+
+            # Patch
+            ${lib.strings.concatMapSep "\n" (file: "patch -Np1 -i ${file}") patches}
+
+            # Configure
+            export CC="tcc -B ${stage1.tinycc.musl.libs.package}/lib"
+            export C_INCLUDE_PATH="${stage1.tinycc.musl.libs.package}/include:$(pwd)/mpfr/src"
+            export CPLUS_INCLUDE_PATH="$C_INCLUDE_PATH"
+
+            # Avoid "Link tests are not allowed after GCC_NO_EXECUTABLES"
+            export lt_cv_shlibpath_overrides_runpath=yes
+            export ac_cv_func_memcpy=yes
+            export ac_cv_func_strerror=yes
+
+            bash ./configure \
+              --prefix=$out \
+              --build=${platform.build} \
+              --host=${platform.host} \
+              --with-native-system-header-dir=${stage1.tinycc.musl.libs.package}/include \
+              --with-build-sysroot=${stage1.tinycc.musl.libs.package}/include \
+              --disable-bootstrap \
+              --disable-decimal-float \
+              --disable-libatomic \
+              --disable-libcilkrts \
+              --disable-libgomp \
+              --disable-libitm \
+              --disable-libmudflap \
+              --disable-libquadmath \
+              --disable-libsanitizer \
+              --disable-libssp \
+              --disable-libvtv \
+              --disable-lto \
+              --disable-lto-plugin \
+              --disable-multilib \
+              --disable-plugin \
+              --disable-threads \
+              --enable-languages=c \
+              --enable-static \
+              --disable-shared \
+              --enable-threads=single \
+              --disable-libstdcxx-pch \
+              --disable-build-with-cxx
+
+            # Build
+            # FIXME: This throws an error when called with more than a single job core.
+            # The error is "line 6:  5629 Alarm clock" which seems to be timeout related.
+            #
+            # make -j $NIX_BUILD_CORES
+            make
+
+            # Install
+            # FIXME: This throws an error when called with more than a single job core.
+            # The error is "line 6:  5629 Alarm clock" which seems to be timeout related.
+            #
+            # make -j $NIX_BUILD_CORES install
+            make install
+          '';
+        };
+    };
+  };
+}