diff --git a/astronaut b/astronaut
index 4ad460f..2c3ce84 100755
--- a/astronaut
+++ b/astronaut
@@ -25,13 +25,13 @@ while getopts "h?s:b:i:" opt; do
             exit 0
             ;;
         s)
-            dir_source=$(realpath "$OPTARG")
+            dir_source="$(realpath "$OPTARG")"
             ;;
         b)
-            dir_build=$(realpath "$OPTARG")
+            dir_build="$(realpath "$OPTARG")"
             ;;
         i)
-            dir_install=$(realpath "$OPTARG")
+            dir_install="$(realpath "$OPTARG")"
             ;;
     esac
 done
@@ -44,7 +44,7 @@ if [ ! "$1" ]; then
     exit 1
 fi
 
-satellite=$(realpath "$1")
+satellite="$(realpath "$1")"
 
 # Tools for the astronaut
 msg() {
@@ -56,11 +56,11 @@ mksum() {
 }
 
 download() {
-    local name=$(basename "$1")
+    local name="$(basename "$1")"
     local path="$dir_source/$name"
     local checksum=""
     if [ "$2" -a -f "$path" ]; then
-        checksum=$(mksum "$path")
+        checksum="$(mksum "$path")"
     fi
     if [ ! -f "$path" -o "$checksum" != "$2" ]; then
         msg "Downloading $name"
@@ -70,7 +70,7 @@ download() {
         else
             curl -#L -o "$path" "$1"
         fi
-        checksum=$(mksum "$path")
+        checksum="$(mksum "$path")"
         if [ "$2" -a "$checksum" != "$2" ]; then
             msg "Houston, we have a problem: Checksum failed."
             msg "Checksum: $checksum"
@@ -91,11 +91,11 @@ extract() {
 
 dlextract() {
     download "$1" "$2"
-    extract "$(basename ""$1"")"
+    extract "$(basename "$1")"
 }
 
 extrafile() {
-    cp "$(dirname ""$satellite"")/$1" "$dir_build/$1"
+    cp "$(dirname "$satellite")/$1" "$dir_build/$1"
 }
 
 # Create the satellite
diff --git a/tools/env b/tools/env
new file mode 100755
index 0000000..4c9687d
--- /dev/null
+++ b/tools/env
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+if [ "$(basename "$(readlink /bin/sh)")" = "bash" ]; then
+    shellopts="+h"
+    moreps1="\u:\w "
+fi
+
+umask 022
+env -i \
+    HOME=$HOME \
+    TERM=$TERM \
+    PS1="(buildenv) $moreps1\$ " \
+    LC_ALL=C \
+    PATH=/tools/bin:$PATH \
+    MAKEFLAGS=$MAKEFLAGS \
+    rocket=$rocket \
+    target=$(uname -m)-rocket-linux-gnu \
+    /bin/sh $shellopts
diff --git a/chroot/library-check.sh b/tools/library-check.sh
similarity index 100%
rename from chroot/library-check.sh
rename to tools/library-check.sh
diff --git a/tools/satellites/binutils-1.sat b/tools/satellites/binutils-1.sat
new file mode 100644
index 0000000..cd3dd6d
--- /dev/null
+++ b/tools/satellites/binutils-1.sat
@@ -0,0 +1,23 @@
+name=binutils
+version=2.24
+
+dlextract "http://ftp.gnu.org/gnu/$name/$name-$version.tar.bz2" \
+          "e0f71a7b2ddab0f8612336ac81d9636b"
+
+mkdir "$name-build"; cd "$name-build"
+
+"../$name-$version/configure" \
+    --prefix=/tools \
+    --with-sysroot="$dir_install" \
+    --with-lib-path=/tools/lib \
+    --target="$target" \
+    --disable-nls \
+    --disable-werror
+
+make
+
+case $(uname -m) in
+      x86_64) mkdir "$dir_install/tools/lib" && ln -s lib "$dir_install/tools/lib64" ;;
+esac
+
+make DESTDIR="$dir_install" install
diff --git a/tools/satellites/binutils-2.sat b/tools/satellites/binutils-2.sat
new file mode 100644
index 0000000..50b811b
--- /dev/null
+++ b/tools/satellites/binutils-2.sat
@@ -0,0 +1,23 @@
+name=binutils
+version=2.24
+
+dlextract "http://ftp.gnu.org/gnu/$name/$name-$version.tar.bz2" \
+          "e0f71a7b2ddab0f8612336ac81d9636b"
+
+mkdir "$name-build"; cd "$name-build"
+
+CC="$target-gcc" \
+AR="$target-ar" \
+RANLIB="$target-ranlib" \
+"../$name-$version/configure" \
+    --prefix=/tools \
+    --disable-nls \
+    --disable-werror \
+    --with-lib-path=/tools/lib \
+    --with-sysroot
+
+make; make DESTDIR="$dir_install" install
+
+make -C ld clean
+make -C ld LIB_PATH=/usr/lib:/lib
+cp ld/ld-new "$dir_install/tools/bin/ld-new"
diff --git a/tools/satellites/gcc-1.sat b/tools/satellites/gcc-1.sat
new file mode 100644
index 0000000..a17296a
--- /dev/null
+++ b/tools/satellites/gcc-1.sat
@@ -0,0 +1,68 @@
+name=gcc
+version=4.9.2
+gmp_version=6.0.0
+gmp_minver=a
+mpfr_version=3.1.2
+mpc_version=1.0.2
+
+dlextract "http://ftp.gnu.org/gnu/$name/$name-$version/$name-$version.tar.bz2" \
+          "4df8ee253b7f3863ad0b86359cd39c43"
+download "http://ftp.gnu.org/gnu/gmp/gmp-$gmp_version$gmp_minver.tar.xz" \
+         "1e6da4e434553d2811437aa42c7f7c76"
+download "http://ftp.gnu.org/gnu/mpfr/mpfr-$mpfr_version.tar.xz" \
+         "e3d203d188b8fe60bb6578dd3152e05c"
+download "http://ftp.gnu.org/gnu/mpc/mpc-$mpc_version.tar.gz" \
+         "68fadff3358fb3e7976c7a398a0af4c3"
+
+cd "$name-$version"
+
+extract "gmp-$gmp_version$gmp_minver.tar.xz"
+extract "mpfr-$mpfr_version.tar.xz"
+extract "mpc-$mpc_version.tar.gz"
+mv "gmp-$gmp_version" gmp
+mv "mpfr-$mpfr_version" mpfr
+mv "mpc-$mpc_version" mpc
+
+for file in \
+    $(find gcc/config -name linux64.h -o -name linux.h -o -name sysv4.h)
+do
+    cp -u $file $file.orig
+    sed -e 's@/lib\(64\)\?\(32\)\?/ld@/tools&@g' \
+        -e 's@/usr@/tools@g' $file.orig > $file
+    echo '
+#undef STANDARD_STARTFILE_PREFIX_1
+#undef STANDARD_STARTFILE_PREFIX_2
+#define STANDARD_STARTFILE_PREFIX_1 "/tools/lib/"
+#define STANDARD_STARTFILE_PREFIX_2 ""' >> $file
+    touch $file.orig
+done
+
+sed -i '/k prot/agcc_cv_libc_provides_ssp=yes' gcc/configure
+
+mkdir "../$name-build"; cd "../$name-build"
+
+"../$name-$version/configure" \
+    --target="$target" \
+    --prefix=/tools \
+    --with-sysroot="$dir_install" \
+    --with-newlib \
+    --without-headers \
+    --with-local-prefix=/tools \
+    --with-native-system-header-dir=/tools/include \
+    --disable-nls \
+    --disable-shared \
+    --disable-multilib \
+    --disable-decimal-float \
+    --disable-threads \
+    --disable-libatomic \
+    --disable-libgomp \
+    --disable-libitm \
+    --disable-libquadmath \
+    --disable-libsanitizer \
+    --disable-libssp \
+    --disable-libvtv \
+    --disable-libcilkrts \
+    --disable-libstdc++-v3 \
+    --enable-languages=c,c++
+
+make; make DESTDIR="$dir_install" install
diff --git a/tools/satellites/gcc-2.sat b/tools/satellites/gcc-2.sat
new file mode 100644
index 0000000..aceef43
--- /dev/null
+++ b/tools/satellites/gcc-2.sat
@@ -0,0 +1,62 @@
+name=gcc
+version=4.9.2
+gmp_version=6.0.0
+gmp_minver=a
+mpfr_version=3.1.2
+mpc_version=1.0.2
+
+dlextract "http://ftp.gnu.org/gnu/$name/$name-$version/$name-$version.tar.bz2" \
+          "4df8ee253b7f3863ad0b86359cd39c43"
+download "http://ftp.gnu.org/gnu/gmp/gmp-$gmp_version$gmp_minver.tar.xz" \
+         "1e6da4e434553d2811437aa42c7f7c76"
+download "http://ftp.gnu.org/gnu/mpfr/mpfr-$mpfr_version.tar.xz" \
+         "e3d203d188b8fe60bb6578dd3152e05c"
+download "http://ftp.gnu.org/gnu/mpc/mpc-$mpc_version.tar.gz" \
+         "68fadff3358fb3e7976c7a398a0af4c3"
+
+cd "$name-$version"
+
+extract "gmp-$gmp_version$gmp_minver.tar.xz"
+extract "mpfr-$mpfr_version.tar.xz"
+extract "mpc-$mpc_version.tar.gz"
+mv "gmp-$gmp_version" gmp
+mv "mpfr-$mpfr_version" mpfr
+mv "mpc-$mpc_version" mpc
+
+for file in \
+    $(find gcc/config -name linux64.h -o -name linux.h -o -name sysv4.h)
+do
+    cp -u $file $file.orig
+    sed -e 's@/lib\(64\)\?\(32\)\?/ld@/tools&@g' \
+        -e 's@/usr@/tools@g' $file.orig > $file
+    echo '
+#undef STANDARD_STARTFILE_PREFIX_1
+#undef STANDARD_STARTFILE_PREFIX_2
+#define STANDARD_STARTFILE_PREFIX_1 "/tools/lib/"
+#define STANDARD_STARTFILE_PREFIX_2 ""' >> $file
+    touch $file.orig
+done
+
+sed -i '/k prot/agcc_cv_libc_provides_ssp=yes' gcc/configure
+
+cat gcc/limitx.h gcc/glimits.h gcc/limity.h > \
+      "`dirname "$($target-gcc -print-libgcc-file-name)"`/include-fixed/limits.h"
+
+mkdir "../$name-build"; cd "../$name-build"
+
+CC="$target-gcc" \
+CXX="$target-g++" \
+AR="$target-ar" \
+RANLIB="$target-ranlib" \
+"../$name-$version/configure" \
+    --prefix=/tools \
+    --with-local-prefix=/tools \
+    --with-native-system-header-dir=/tools/include \
+    --enable-languages=c,c++ \
+    --disable-libstdcxx-pch \
+    --disable-multilib \
+    --disable-bootstrap \
+    --disable-libgomp
+
+make; make DESTDIR="$dir_install" install
+ln -s gcc "$dir_install/tools/bin/cc"
diff --git a/tools/satellites/glibc.sat b/tools/satellites/glibc.sat
new file mode 100644
index 0000000..4396b02
--- /dev/null
+++ b/tools/satellites/glibc.sat
@@ -0,0 +1,20 @@
+name=glibc
+version=2.20
+
+dlextract "http://ftp.gnu.org/gnu/libc/glibc-2.20.tar.xz" \
+          "948a6e06419a01bd51e97206861595b0"
+
+mkdir "$name-build"; cd "$name-build"
+
+"../$name-$version/configure" \
+    --prefix=/tools \
+    --host="$target" \
+    --build="$(../glibc-2.20/scripts/config.guess)" \
+    --disable-profile \
+    --enable-kernel=2.6.32 \
+    --with-headers="$dir_install/tools/include" \
+    libc_cv_forced_unwind=yes \
+    libc_cv_ctors_header=yes \
+    libc_cv_c_cleanup=yes
+
+make; make DESTDIR="$dir_install" install
diff --git a/tools/satellites/libstdc.sat b/tools/satellites/libstdc.sat
new file mode 100644
index 0000000..3bba1f8
--- /dev/null
+++ b/tools/satellites/libstdc.sat
@@ -0,0 +1,19 @@
+name=gcc
+version=4.9.2
+
+dlextract "http://ftp.gnu.org/gnu/$name/$name-$version/$name-$version.tar.bz2" \
+          "4df8ee253b7f3863ad0b86359cd39c43"
+
+mkdir "$name-build"; cd "$name-build"
+
+"../$name-$version/libstdc++-v3/configure" \
+    --host="$target" \
+    --prefix=/tools \
+    --disable-multilib \
+    --disable-shared \
+    --disable-nls \
+    --disable-libstdcxx-threads \
+    --disable-libstdcxx-pch \
+    --with-gxx-include-dir="/tools/$target/include/c++/$version"
+
+make; make DESTDIR="$dir_install" install
diff --git a/tools/satellites/linux-api.sat b/tools/satellites/linux-api.sat
new file mode 100644
index 0000000..180cd19
--- /dev/null
+++ b/tools/satellites/linux-api.sat
@@ -0,0 +1,10 @@
+name=linux
+version=3.17.2
+
+dlextract "https://www.kernel.org/pub/$name/kernel/v3.x/$name-$version.tar.xz" \
+          "87444e6f0906e2ec783cf0ed6aab1a56"
+
+cd "$name-$version"
+
+make mrproper
+make INSTALL_HDR_PATH="$dir_install/tools" headers_install
diff --git a/chroot/version-check.sh b/tools/version-check.sh
similarity index 100%
rename from chroot/version-check.sh
rename to tools/version-check.sh