diff --git a/src/main.cr b/src/main.cr
index 84bfc63..61b9f9a 100644
--- a/src/main.cr
+++ b/src/main.cr
@@ -32,6 +32,80 @@ recipes << Recipe.new(context, "hello", "2.10").tap do |recipe|
 	#end
 end
 
+recipes << Recipe.new(context, "automake", "1.16").tap do |recipe|
+	recipe.sources << "https://ftp.gnu.org/gnu/automake/automake-#{recipe.version}.tar.gz"
+end
+
+recipes << Recipe.new(context, "autoconf", "2.69").tap do |recipe|
+	recipe.sources << "https://ftp.gnu.org/gnu/autoconf/autoconf-#{recipe.version}.tar.gz"
+
+	recipe.dependencies << "m4" << "perl"
+end
+
+recipes << Recipe.new(context, "libtool", "2.4.6").tap do |recipe|
+	recipe.sources << "http://ftpmirror.gnu.org/libtool/libtool-#{recipe.version}.tar.gz"
+end
+
+recipes << Recipe.new(context, "m4", "1.4.18").tap do |recipe|
+	recipe.sources << "https://ftp.gnu.org/gnu/m4/m4-#{recipe.version}.tar.gz"
+	recipe.dependencies << "perl"
+end
+
+recipes << Recipe.new(context, "bzip2", "1.0.6").tap do |recipe|
+	recipe.sources << "https://downloads.sourceforge.net/project/bzip2/bzip2-#{recipe.version}.tar.gz"
+
+	recipe.instructions.configure << "sed -i.orig -e '/^CFLAGS=/s/.*/CFLAGS = -O2 -fPIC/' #{recipe.dirname}/Makefile"
+	recipe.options["make install"] = "PREFIX='#{recipe.fake_root_directory}/usr'"
+end
+
+recipes << Recipe.new(context, "perl", "5.30.0").tap do |recipe|
+	recipe.sources << "https://www.cpan.org/src/5.0/perl-#{recipe.version}.tar.gz"
+
+	recipe.dependencies << "zlib" << "bzip2"
+
+	recipe.instructions.build << %(
+		set -e -x;
+		cd #{recipe.dirname};
+		BUILD_ZLIB=0;
+		BUILD_BZIP2=0;
+		BZIP2_LIB=/usr/lib;
+		BZIP2_INCLUDE=/usr/inculde;
+
+		export BUILD_ZLIB BUILD_BZIP2 BZIP2_LIB BZIP2_INCLUDE;
+		./Configure -des \
+			-Dcccdlflags='-fPIC' \
+			-Dcccdlflags='-fPIC' \
+			-Dccdlflags='-rdynamic' \
+			-Dprefix=/usr \
+			-Uprivlib=$_privlib \
+			-Darchlib=$_archlib \
+			-Dvendorprefix=/usr \
+			-Dvendorlib=/usr/share/perl5/vendor_perl \
+			-Dvendorarch=/usr/lib/perl5/vendor_perl \
+			-Dsiteprefix=/usr/local \
+			-Dsitelib=/usr/local/share/perl5/site_perl \
+			-Dsitearch=/usr/local/lib/perl5/site_perl \
+			-Dlocincpth=' ' \
+			-Dcc=gcc \
+			-Uoptimize="$CFLAGS" \
+			-Duselargefiles \
+			-Dusethreads \
+			-Duseshrplib \
+			-Dd_semctl_semun \
+			-Dman1dir=/usr/share/man/man1 \
+			-Dman3dir=/usr/share/man/man3 \
+			-Dinstallman1dir=/usr/share/man/man1 \
+			-Dinstallman3dir=/usr/share/man/man3 \
+			-Dman1ext='1' \
+			-Dman3ext='3pm' \
+			-Dcf_by='Alpine' \
+			-Ud_csh \
+			-Dusenm \
+		|| return 1
+		make libperl.so && make || return 1
+	)
+end
+
 recipes << Recipe.new(context, "apk-tools", "2.10.4").tap do |recipe|
 	recipe.sources << "https://dev.alpinelinux.org/archive/apk-tools/apk-tools-#{recipe.version}.tar.xz"
 
@@ -49,13 +123,43 @@ recipes << Recipe.new(context, "apk-tools", "2.10.4").tap do |recipe|
 		recipe.instructions.install << "mkdir -p '#{recipe.fake_root_directory}#{dir}'"
 	end
 
-	#recipe.build_dependencies << "zlib-dev" << "openssl-dev"
+	#recipe.build_dependencies << "zlib-dev" << "openssl-dev" << "linux-dev"
 end
 
 recipes << Recipe.new(context, "abuild", "3.4.0").tap do |recipe|
 	recipe.sources << "https://dev.alpinelinux.org/archive/abuild/abuild-#{recipe.version}.tar.xz"
 end
 
+recipes << Recipe.new(context, "pkg-config", "0.29.2").tap do |recipe|
+	recipe.sources << "http://pkgconfig.freedesktop.org/releases/pkg-config-#{recipe.version}.tar.gz"
+
+	# FIXME: We’ll want to remove this at some point.
+	recipe.options["configure"] = "--with-internal-glib"
+end
+
+recipes << Recipe.new(context, "tar", "1.32").tap do |recipe|
+	recipe.sources << "http://ftp.gnu.org/gnu/tar/tar-#{recipe.version}.tar.gz"
+	recipe.options["configure"] = "FORCE_UNSAFE_CONFIGURE=1"
+end
+
+recipes << Recipe.new(context, "libarchive", "3.3.3").tap do |recipe|
+	recipe.sources << "https://www.libarchive.org/downloads/libarchive-#{recipe.version}.tar.gz"
+
+	# Conflicts with “tar” (gnu tar)
+	#recipe.instructions.install << "cd #{recipe.dirname} && make DESTDIR='#{recipe.fake_root_directory}' install"
+	#recipe.instructions.install << "cd '#{recipe.fake_root_directory}' && ln -s /usr/bin/bsdtar usr/bin/tar"
+end
+
+# FIXME: Build and install the actual kernel.
+recipes << Recipe.new(context, "linux", "5.2.4").tap do |recipe|
+	recipe.sources << "https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-#{recipe.version}.tar.xz"
+
+	recipe.instructions.build << "true"
+
+	recipe.instructions.install << "mkdir -p '#{recipe.fake_root_directory}/usr'"
+	recipe.instructions.install << "cd '#{recipe.dirname}' && make headers_install ARCH=x86_64 INSTALL_HDR_PATH='#{recipe.fake_root_directory}/usr'"
+end
+
 recipes << Recipe.new(context, "make", "4.2").tap do |recipe|
 	recipe.sources << "https://ftp.gnu.org/gnu/make/make-#{recipe.version}.tar.gz"
 end
@@ -70,6 +174,7 @@ recipes << Recipe.new(context, "sysvinit", "2.95").tap do |recipe|
 	recipe.sources << "https://git.savannah.nongnu.org/cgit/sysvinit.git/snapshot/sysvinit-#{recipe.version}.tar.gz"
 	recipe.url = "https://savannah.nongnu.org/projects/sysvinit"
 	recipe.description = "System V-like init system."
+	recipe.dependencies << "util-linux"
 
 	recipe.instructions.install << "cd sysvinit-#{recipe.version} && make ROOT='#{recipe.fake_root_directory}' install"
 end
@@ -85,6 +190,46 @@ end
 
 recipes << Recipe.new(context, "libffi", "3.2.1").tap do |recipe|
 	recipe.sources << "ftp://sourceware.org/pub/libffi/libffi-#{recipe.version}.tar.gz"
+
+	recipe.instructions.install << %{
+		set -e;
+		cd #{recipe.dirname};
+		make DESTDIR="#{recipe.fake_root_directory}" install;
+		cd "#{recipe.fake_root_directory}";
+		mv usr/lib/libffi-#{recipe.version}/include usr;
+		nuke usr/lib/libffi-#{recipe.version}
+	}
+end
+
+recipes << Recipe.new(context, "python", "3.7.4").tap do |recipe|
+	recipe.sources << "https://www.python.org/ftp/python/#{recipe.version}/Python-#{recipe.version}.tgz"
+	recipe.dirname = "Python-#{recipe.version}"
+end
+
+recipes << Recipe.new(context, "crystal", "0.29.9").tap do |recipe|
+	# FIXME: Arrows, ASAP.
+	#recipe.sources << "https://github.com/crystal-lang/crystal/archive/#{recipe.version}.tar.gz"
+
+	recipe.dirname = "crystal-8b3dba72bd681118b2b761c68d7d2fdcbbbfceb2"
+	recipe.sources << "https://github.com/crystal-lang/crystal/archive/8b3dba72bd681118b2b761c68d7d2fdcbbbfceb2.zip"
+
+	recipe.dependencies << "libyaml" << "libevent" << "pcre" << "openssl"
+
+	recipe.options["make"] = "release=1 LLVM_CONFIG=/usr/bad/llvm-6/bin/llvm-config"
+	recipe.instructions.install << %{
+		set -e
+		cd #{recipe.dirname};
+		PKG="#{recipe.fake_root_directory}";
+		mkdir -p "$PKG/usr/bin";
+		mkdir -p "$PKG/usr/lib/crystal/core";
+		mkdir -p "$PKG/usr/share/man/man1";
+
+		install -D -m 755 .build/crystal "$PKG"/usr/bin/crystal;
+		install -D -m 644 man/crystal.1 "$PKG"/usr/share/man/man1/crystal.1;
+		cp -r src/* "$PKG/usr/lib/crystal/core";
+		cd "$PKG/usr/lib/crystal/core";
+		nuke ext/sigfault.* llvm/ext/llvm_ext.o
+	}
 end
 
 [{"6", "6.0.1"}, {"7", "7.1.0"},{"8", "8.0.0"}].each do |branch, version|
@@ -132,6 +277,10 @@ EOF
 	end
 end
 
+recipes << Recipe.new(context, "cmake", "3.15.1").tap do |recipe|
+	recipe.sources << "https://github.com/Kitware/CMake/releases/download/v3.15.1/cmake-#{recipe.version}.tar.gz"
+end
+
 recipes << Recipe.new(context, "gmp", "6.1.2").tap do |recipe|
 	recipe.sources << "https://gmplib.org/download/gmp/gmp-#{recipe.version}.tar.xz"
 end
@@ -151,9 +300,14 @@ recipes << Recipe.new(context, "gcc", "9.1.0").tap do |recipe|
 
 	recipe.dirname = "build"
 	recipe.instructions.configure << %(
+		set -e;
 		mkdir build;
-		cd build && ../gcc-#{recipe.version}/configure \
+		cd build;
+		sed -e '/m64=/s/lib64/lib/' \
+			-i.orig ../gcc-#{recipe.version}/gcc/config/i386/t-linux64;
+		../gcc-#{recipe.version}/configure \
 			--prefix=/usr \
+			--libdir=/usr/lib \
 			--disable-multilib \
 			--disable-libssp \
 			--disable-libmpx \
@@ -173,6 +327,7 @@ recipes << Recipe.new(context, "zsh", "5.7.1").tap do |recipe|
 	recipe.url = "https://zsh.org"
 	recipe.description = "Zsh is a shell designed for interactive use, although it is also a powerful scripting language."
 	recipe.dependencies << "ncurses"
+	recipe.options["configure"] = "--with-tcsetpgrp"
 
 	# Build-deps.
 	#recipe.build_dependencies << "ncurses-dev"
@@ -219,6 +374,8 @@ recipes << Recipe.new(context, "libyaml", "0.2.2").tap do |recipe|
 	recipe.sources << "https://github.com/yaml/libyaml/archive/#{recipe.version}.tar.gz"
 
 	recipe.instructions.configure << "cd libyaml-#{recipe.version} && ./bootstrap && ./configure --prefix=/usr"
+
+	# recipe.build_dependencies << "autoconf" << "libtool"
 end
 
 # FIXME: This one will fail on non-x86_64 platforms. Also on non-linux
@@ -255,7 +412,12 @@ end
 recipes << Recipe.new(context, "binutils", "2.32").tap do |recipe|
 	recipe.sources << "https://ftp.gnu.org/gnu/binutils/binutils-#{recipe.version}.tar.xz"
 
-	recipe.instructions.install << "cd #{recipe.dirname} && make 'DESTDIR=#{recipe.fake_root_directory}' install && rm '#{recipe.fake_root_directory}/usr/bin/strings'"
+	recipe.options["configure"] = %( \
+		--disable-multilib \
+		--with-pic --disable-nls
+	)
+	recipe.options["make"] = "tooldir=/usr"
+	recipe.instructions.install << "cd #{recipe.dirname} && make 'DESTDIR=#{recipe.fake_root_directory}' tooldir=/usr install && rm '#{recipe.fake_root_directory}/usr/bin/strings'"
 end
 
 recipes << Recipe.new(context, "readline", "8.0").tap do |recipe|
@@ -287,30 +449,30 @@ selected_recipes = ARGV.map do |name|
 end
 
 if selected_recipes.any? &.is_a?(String)
-	puts "At least one of the requested recipes is not known."
+		puts "At least one of the requested recipes is not known."
 
-	selected_recipes.select! &.is_a?(String)
-	pp! selected_recipes
-end
-
-# Getting rid of Strings.
-selected_recipes = selected_recipes.compact_map do |recipe|
-	if recipe.is_a? String
-		nil
-	else
-		recipe
+		selected_recipes.select! &.is_a?(String)
+		pp! selected_recipes
 	end
-end
 
-selected_recipes.each do |recipe|
-	pp recipe
+	# Getting rid of Strings.
+	selected_recipes = selected_recipes.compact_map do |recipe|
+		if recipe.is_a? String
+			nil
+		else
+			recipe
+		end
+	end
 
-	raise "oh no, download failed" unless recipe.download
-	raise "oh no, extraction failed" unless recipe.extract
+	selected_recipes.each do |recipe|
+		pp recipe
 
-	raise "oh no, build failed" unless recipe.build
-	raise "oh no, packaging failed" unless recipe.package
+		raise "oh no, download failed" unless recipe.download
+		raise "oh no, extraction failed" unless recipe.extract
 
-	recipe.clean
-end
+		raise "oh no, build failed" unless recipe.build
+		raise "oh no, packaging failed" unless recipe.package
+
+		recipe.clean
+	end