diff --git a/.gitignore b/.gitignore
index db57e0b6..44f99e70 100644
--- a/.gitignore
+++ b/.gitignore
@@ -47,41 +47,6 @@
 /libc/include/Makefile.in
 /tests/Makefile.in
 
-########################
-# To build out of root #
-########################
-
-/build/dev-native/*
-!/build/dev-native/config
-/build/dev-cross-i386/*
-!/build/dev-cross-i386/config
-/build/dev-cross-riscv64/*
-!/build/dev-cross-riscv64/config
-/build/dev-cross-x86_64/*
-!/build/dev-cross-x86_64/config
-
-/build/root-native/*
-!/build/root-native/config
-/build/root-cross-i386-linux/*
-!/build/root-cross-i386-linux/config
-/build/root-cross-riscv64-linux/*
-!/build/root-cross-riscv64-linux/config
-/build/root-cross-x86_64-linux/*
-!/build/root-cross-x86_64-linux/config
-
-##########################
-# To install out of root #
-##########################
-
-/dest/dev-native/*
-!/dest/dev-native/.keep
-/dest/dev-cross-i386/*
-!/dest/dev-cross-i386/.keep
-/dest/dev-cross-riscv64/*
-!/dest/dev-cross-riscv64/.keep
-/dest/dev-cross-x86_64/*
-!/dest/dev-cross-x86_64/.keep
-
 ###########################################
 # Only generated when configuring in root #
 ###########################################
diff --git a/.gitmodules b/.gitmodules
index 1bbbb8cc..0f7ea813 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,7 +1,3 @@
-[submodule "vendor/cross"]
-	path = vendor/cross
-	url = https://github.com/tailix/cross.git
-	ignore = dirty
 [submodule "vendor/mruby"]
 	path = vendor/mruby
 	url = https://github.com/mruby/mruby.git
diff --git a/build/dev-cross-i386/config b/build/dev-cross-i386/config
deleted file mode 120000
index 0e9b48d8..00000000
--- a/build/dev-cross-i386/config
+++ /dev/null
@@ -1 +0,0 @@
-../../config/dev-cross-i386
\ No newline at end of file
diff --git a/build/dev-cross-riscv64/config b/build/dev-cross-riscv64/config
deleted file mode 120000
index c91bd524..00000000
--- a/build/dev-cross-riscv64/config
+++ /dev/null
@@ -1 +0,0 @@
-../../config/dev-cross-riscv64
\ No newline at end of file
diff --git a/build/dev-cross-x86_64/config b/build/dev-cross-x86_64/config
deleted file mode 120000
index 0f9e3c20..00000000
--- a/build/dev-cross-x86_64/config
+++ /dev/null
@@ -1 +0,0 @@
-../../config/dev-cross-x86_64
\ No newline at end of file
diff --git a/build/dev-native/config b/build/dev-native/config
deleted file mode 120000
index fa742258..00000000
--- a/build/dev-native/config
+++ /dev/null
@@ -1 +0,0 @@
-../../config/dev-native
\ No newline at end of file
diff --git a/build/root-cross-i386-linux/config b/build/root-cross-i386-linux/config
deleted file mode 120000
index a1856e14..00000000
--- a/build/root-cross-i386-linux/config
+++ /dev/null
@@ -1 +0,0 @@
-../../config/root-cross-i386-linux
\ No newline at end of file
diff --git a/build/root-cross-riscv64-linux/config b/build/root-cross-riscv64-linux/config
deleted file mode 120000
index 1c9350e9..00000000
--- a/build/root-cross-riscv64-linux/config
+++ /dev/null
@@ -1 +0,0 @@
-../../config/root-cross-riscv64-linux
\ No newline at end of file
diff --git a/build/root-cross-x86_64-linux/config b/build/root-cross-x86_64-linux/config
deleted file mode 120000
index 91b51791..00000000
--- a/build/root-cross-x86_64-linux/config
+++ /dev/null
@@ -1 +0,0 @@
-../../config/root-cross-x86_64-linux
\ No newline at end of file
diff --git a/build/root-native/config b/build/root-native/config
deleted file mode 120000
index ff85f848..00000000
--- a/build/root-native/config
+++ /dev/null
@@ -1 +0,0 @@
-../../config/root-native
\ No newline at end of file
diff --git a/config/dev-cross-i386 b/config/dev-cross-i386
deleted file mode 100755
index 70ecef7c..00000000
--- a/config/dev-cross-i386
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-REPO="$(realpath "$(dirname "$(realpath "$0")")/..")"
-if [ -f "$REPO/Makefile" ]; then make -C "$REPO" distclean; fi
-
-ARCH='i386'
-HOST="$ARCH-elf"
-PREFIX="$REPO/dest/dev-cross-$ARCH"
-CROSS="$REPO/vendor/cross/root/bin/$HOST"
-
-export     AR="$CROSS-ar"
-export     CC="$CROSS-gcc"
-export RANLIB="$CROSS-ranlib"
-
-"$REPO/configure" --host="$HOST" --prefix="$PREFIX" --enable-freestanding --with-libc
diff --git a/config/dev-cross-riscv64 b/config/dev-cross-riscv64
deleted file mode 100755
index 57b29fff..00000000
--- a/config/dev-cross-riscv64
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-REPO="$(realpath "$(dirname "$(realpath "$0")")/..")"
-if [ -f "$REPO/Makefile" ]; then make -C "$REPO" distclean; fi
-
-ARCH='riscv64'
-HOST="$ARCH-elf"
-PREFIX="$REPO/dest/dev-cross-$ARCH"
-CROSS="$REPO/vendor/cross/root/bin/$HOST"
-
-export     AR="$CROSS-ar"
-export     CC="$CROSS-gcc"
-export RANLIB="$CROSS-ranlib"
-
-"$REPO/configure" --host="$HOST" --prefix="$PREFIX" --enable-freestanding --with-libc
diff --git a/config/dev-cross-x86_64 b/config/dev-cross-x86_64
deleted file mode 100755
index 4a900b6d..00000000
--- a/config/dev-cross-x86_64
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-REPO="$(realpath "$(dirname "$(realpath "$0")")/..")"
-if [ -f "$REPO/Makefile" ]; then make -C "$REPO" distclean; fi
-
-ARCH='x86_64'
-HOST="$ARCH-elf"
-PREFIX="$REPO/dest/dev-cross-$ARCH"
-CROSS="$REPO/vendor/cross/root/bin/$HOST"
-
-export     AR="$CROSS-ar"
-export     CC="$CROSS-gcc"
-export RANLIB="$CROSS-ranlib"
-
-export CFLAGS='-mabi=sysv -mcmodel=kernel -mno-80387 -mno-red-zone'
-
-"$REPO/configure" --host="$HOST" --prefix="$PREFIX" --enable-freestanding --with-libc
diff --git a/config/dev-native b/config/dev-native
deleted file mode 100755
index effcd78a..00000000
--- a/config/dev-native
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-REPO="$(realpath "$(dirname "$(realpath "$0")")/..")"
-if [ -f "$REPO/Makefile" ]; then make -C "$REPO" distclean; fi
-
-PREFIX="$REPO/dest/dev-native"
-
-"$REPO/configure" --prefix="$PREFIX" --enable-checks-all
diff --git a/config/root-cross-i386-linux b/config/root-cross-i386-linux
deleted file mode 100755
index 1b780e3e..00000000
--- a/config/root-cross-i386-linux
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-REPO="$(realpath "$(dirname "$(realpath "$0")")/..")"
-if [ -f "$REPO/Makefile" ]; then make -C "$REPO" distclean; fi
-
-ARCH='i386'
-HOST="$ARCH-elf"
-TARGET='i686-linux-gnu'
-PREFIX="/opt/tailix/libkernaux/$ARCH"
-
-export     AR="$TARGET-ar"
-export     CC="$TARGET-gcc"
-export RANLIB="$TARGET-ranlib"
-
-"$REPO/configure" --host="$HOST" --prefix="$PREFIX" --enable-freestanding --with-libc
diff --git a/config/root-cross-riscv64-linux b/config/root-cross-riscv64-linux
deleted file mode 100755
index 4abd582b..00000000
--- a/config/root-cross-riscv64-linux
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-REPO="$(realpath "$(dirname "$(realpath "$0")")/..")"
-if [ -f "$REPO/Makefile" ]; then make -C "$REPO" distclean; fi
-
-ARCH='riscv64'
-HOST="$ARCH-elf"
-TARGET='riscv64-linux-gnu'
-PREFIX="/opt/tailix/libkernaux/$ARCH"
-
-export     AR="$TARGET-ar"
-export     CC="$TARGET-gcc"
-export RANLIB="$TARGET-ranlib"
-
-"$REPO/configure" --host="$HOST" --prefix="$PREFIX" --enable-freestanding --with-libc
diff --git a/config/root-cross-x86_64-linux b/config/root-cross-x86_64-linux
deleted file mode 100755
index 480d7984..00000000
--- a/config/root-cross-x86_64-linux
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-REPO="$(realpath "$(dirname "$(realpath "$0")")/..")"
-if [ -f "$REPO/Makefile" ]; then make -C "$REPO" distclean; fi
-
-ARCH='x86_64'
-HOST="$ARCH-elf"
-TARGET='x86_64-linux-gnu'
-PREFIX="/opt/tailix/libkernaux/$ARCH"
-
-export     AR="$TARGET-ar"
-export     CC="$TARGET-gcc"
-export RANLIB="$TARGET-ranlib"
-
-export CFLAGS='-mabi=sysv -mcmodel=kernel -mno-80387 -mno-red-zone'
-
-"$REPO/configure" --host="$HOST" --prefix="$PREFIX" --enable-freestanding --with-libc
diff --git a/config/root-native b/config/root-native
deleted file mode 100755
index 06b42c74..00000000
--- a/config/root-native
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-REPO="$(realpath "$(dirname "$(realpath "$0")")/..")"
-if [ -f "$REPO/Makefile" ]; then make -C "$REPO" distclean; fi
-
-"$REPO/configure" --enable-checks
diff --git a/dest/dev-cross-i386/.keep b/dest/dev-cross-i386/.keep
deleted file mode 100644
index e69de29b..00000000
diff --git a/dest/dev-cross-riscv64/.keep b/dest/dev-cross-riscv64/.keep
deleted file mode 100644
index e69de29b..00000000
diff --git a/dest/dev-cross-x86_64/.keep b/dest/dev-cross-x86_64/.keep
deleted file mode 100644
index e69de29b..00000000
diff --git a/dest/dev-native/.keep b/dest/dev-native/.keep
deleted file mode 100644
index e69de29b..00000000
diff --git a/vendor/cross b/vendor/cross
deleted file mode 160000
index 5dc1bf89..00000000
--- a/vendor/cross
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 5dc1bf89b00d3d73f7a1ed5d9b1e7268768ea9e8