diff --git a/coreos/.gitignore b/coreos/.gitignore
new file mode 100644
index 0000000..f0d1a87
--- /dev/null
+++ b/coreos/.gitignore
@@ -0,0 +1,4 @@
+coreos_production_*.iso
+coreos_production_*.bin
+coreos_production_*.bin*
+version.txt
diff --git a/coreos/Dockerfile.build b/coreos/Dockerfile.build
new file mode 100644
index 0000000..afa00c0
--- /dev/null
+++ b/coreos/Dockerfile.build
@@ -0,0 +1,42 @@
+FROM debian:jessie
+
+ENV HOME /home/user
+RUN useradd --create-home --shell /bin/bash --home-dir $HOME user
+
+RUN apt-get update && apt-get install -y \
+	bzip2 \
+	ca-certificates \
+	curl \
+	git \
+	gnupg \
+	python \
+	sudo \
+	tar  \
+	xz-utils \
+	--no-install-recommends \
+	&& rm -rf /var/lib/apt/lists/*
+
+COPY version.txt /home/user/
+
+RUN git config --global user.email "no-reply@coreos.com" \
+	&& git config --global user.name "CoreOS Build SDK" \
+	&& curl -sSL https://storage.googleapis.com/git-repo-downloads/repo -o /usr/local/bin/repo \
+	&& chmod a+x /usr/local/bin/repo \
+	&& mkdir -p $HOME/coreos \
+	&& ( \
+		cd $HOME/coreos \
+		&& repo init -u https://github.com/coreos/manifest.git \
+		&& repo sync \
+	) \
+	&& adduser user sudo \
+	&& passwd -d user \
+	&& ln -snvf /dev/true /sbin/modprobe \
+	&& echo "sudo rootfs.sh" > $HOME/.bash_history \
+	&& chown -R user:user $HOME
+
+COPY rootfs.sh /usr/local/bin/
+
+WORKDIR $HOME
+USER user
+
+CMD ["bash"]
diff --git a/coreos/Makefile b/coreos/Makefile
new file mode 100644
index 0000000..2420e31
--- /dev/null
+++ b/coreos/Makefile
@@ -0,0 +1,31 @@
+.PHONY: build_rootfs_image rootfs clean
+
+BASE := http://stable.release.core-os.net/amd64-usr/current
+
+COREOS_IMAGE := coreos_production_image.bin.bz2
+DECOMPRESSED_COREOS_IMAGE := $(COREOS_IMAGE:.bz2=)
+
+VERSION_FILE := version.txt
+
+DOCKER_BUILD_ROOTFS_IMAGE := coreos:build
+
+all: rootfs
+
+$(COREOS_IMAGE):
+	@gpget -O -b -url "$(BASE)/$(COREOS_IMAGE)"
+
+$(DECOMPRESSED_COREOS_IMAGE): $(COREOS_IMAGE)
+	@bzip2 -d "$(COREOS_IMAGE)"
+
+$(VERSION_FILE):
+	@gpget -O -b -url "$(BASE)/$(VERSION_FILE)"
+
+build_rootfs_image: $(VERSION_FILE)
+	@docker build --rm --force-rm -f Dockerfile.build -t $(DOCKER_BUILD_ROOTFS_IMAGE) .
+
+rootfs: build_rootfs_image
+	@sudo modprobe fuse
+	@docker run --rm -it --privileged -v $(CURDIR):/images $(DOCKER_BUILD_ROOTFS_IMAGE) bash
+
+clean:
+	$(RM) $(COREOS_IMAGE) $(DECOMPRESSED_COREOS_IMAGE) $(VERSION_FILE)
diff --git a/coreos/coreos-766.5.0.tar.xz b/coreos/coreos-766.5.0.tar.xz
deleted file mode 100644
index 8df286e..0000000
Binary files a/coreos/coreos-766.5.0.tar.xz and /dev/null differ
diff --git a/coreos/rootfs.sh b/coreos/rootfs.sh
new file mode 100755
index 0000000..b9ff76c
--- /dev/null
+++ b/coreos/rootfs.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+set -e
+
+source /home/user/version.txt
+
+for i in {0..7}; do
+	if [[ ! -e /dev/loop$i ]]; then
+		sudo /bin/mknod -m640 /dev/loop$i b 7 $i
+		sudo /bin/chown root:disk /dev/loop$i
+	else
+		echo "/dev/loop$i exists"
+	fi
+done
+
+(
+cd /home/user/coreos
+./chromite/bin/cros_sdk
+exit
+./chromite/bin/cros_sdk --enter
+./set_shared_user_password.sh
+./setup_board --default --board=amd64-usr
+./build_packages
+./build_image --base_dev_pkg coreos-base/coreos container
+)
+
+#XZ_OPT=-9 tar cvJf "/images/coreos-${COREOS_VERSION}.tar.xz" .
diff --git a/irssi/Dockerfile b/irssi/Dockerfile
index 7465525..ec8c36a 100644
--- a/irssi/Dockerfile
+++ b/irssi/Dockerfile
@@ -1,86 +1,109 @@
-FROM debian:jessie
+FROM alpine:3.3
 
-RUN apt-get update && apt-get install -y --no-install-recommends \
-		ca-certificates \
-		curl \
-		libdatetime-perl \
-		libgcrypt20-dev \
-		libglib2.0-0 \
-		libnotify4 \
-		libnotify-bin \
-		libwww-perl \
-		perl \
-		wget \
-	&& rm -rf /var/lib/apt/lists/*
+RUN apk --no-cache add \
+	ca-certificates
 
 ENV HOME /home/user
-RUN useradd --create-home --home-dir $HOME user \
+RUN adduser -u 1001 -D user \
 	&& mkdir -p $HOME/.irssi \
 	&& chown -R user:user $HOME
 
 ENV LANG C.UTF-8
 
-# gpg: key DDBEF0E1: public key "The Irssi project <staff@irssi.org>" imported
-RUN gpg --keyserver pool.sks-keyservers.net --recv-keys 7EE65E3082A5FB06AC7C368D00CCB587DDBEF0E1
+ENV IRSSI_VERSION 0.8.19
+ENV LIB_OTR_VERSION 4.1.1
+ENV IRSSI_OTR_VERSION 1.0.1
+ENV PATCH_FOR_IRSSI_OTR https://github.com/cryptodotis/irssi-otr/commit/d03ab59b6f27142c1c5e99fedc635a589b1607bb.diff
 
-ENV IRSSI_VERSION 0.8.17
-ENV LIB_OTR_VERSION 4.1.0
-ENV IRSSI_OTR_VERSION 1.0.0
-
-RUN buildDeps=' \
+RUN set -x \
+	&& apk add --no-cache --virtual .build-deps \
 		autoconf \
 		automake \
-		bzip2 \
-		libglib2.0-dev \
-		libncurses-dev \
-		libperl-dev \
-		libssl-dev \
+		ca-certificates \
+		gcc \
+		glib-dev \
+		gnupg \
+		libc-dev \
+		libgcrypt-dev \
 		libtool \
 		lynx \
 		make \
-		pkg-config \
-	' \
-	&& set -x \
-	&& apt-get update && apt-get install -y $buildDeps --no-install-recommends \
-	&& rm -rf /var/lib/apt/lists/* \
-	&& curl -fsSL "https://github.com/irssi-import/irssi/releases/download/${IRSSI_VERSION}/irssi-${IRSSI_VERSION}.tar.bz2" -o /tmp/irssi.tar.bz2 \
-	&& curl -fsSL "https://github.com/irssi-import/irssi/releases/download/${IRSSI_VERSION}/irssi-${IRSSI_VERSION}.tar.bz2.sig" -o /tmp/irssi.tar.bz2.sig \
-	&& gpg --verify /tmp/irssi.tar.bz2.sig \
-	&& mkdir -p /usr/src/irssi \
-	&& tar -xjf /tmp/irssi.tar.bz2 -C /usr/src/irssi --strip-components 1 \
-	&& rm /tmp/irssi.tar.bz2* \
-	&& cd /usr/src/irssi \
-	&& ./configure \
-		--enable-true-color \
-		--prefix="/usr" \
-		--with-bot \
-		--with-proxy \
-		--with-socks \
-	&& make \
-	&& make install \
-	&& curl -sSL "https://otr.cypherpunks.ca/libotr-${LIB_OTR_VERSION}.tar.gz" -o /tmp/libotr.tar.gz \
-	&& curl -sSL "https://otr.cypherpunks.ca/libotr-${LIB_OTR_VERSION}.tar.gz.asc" -o /tmp/libotr.tar.gz.asc \
-	&& curl -sSL "https://otr.cypherpunks.ca/gpgkey.asc" | gpg --import \
-	&& gpg --verify /tmp/libotr.tar.gz.asc \
+		ncurses-dev \
+		openssl-dev \
+		patch \
+		perl-dev \
+		pkgconf \
+		tar \
+		xz \
+	&& wget "https://github.com/irssi/irssi/releases/download/${IRSSI_VERSION}/irssi-${IRSSI_VERSION}.tar.xz" -O /tmp/irssi.tar.xz \
+	&& wget "https://github.com/irssi/irssi/releases/download/${IRSSI_VERSION}/irssi-${IRSSI_VERSION}.tar.xz.asc" -O /tmp/irssi.tar.xz.asc \
+	&& export GNUPGHOME="$(mktemp -d)" \
+# gpg: key DDBEF0E1: public key "The Irssi project <staff@irssi.org>" imported
+	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys 7EE65E3082A5FB06AC7C368D00CCB587DDBEF0E1 \
+	&& gpg --batch --verify /tmp/irssi.tar.xz.asc /tmp/irssi.tar.xz \
+	&& rm -r "$GNUPGHOME" /tmp/irssi.tar.xz.asc \
+	&& mkdir -p /usr/src \
+	&& tar -xJf /tmp/irssi.tar.xz -C /usr/src \
+	&& rm /tmp/irssi.tar.xz \
+	&& ( \
+		cd /usr/src/irssi-$IRSSI_VERSION \
+		&& ./configure \
+			--enable-true-color \
+			--with-bot \
+			--with-proxy \
+			--with-socks \
+			--prefix=/usr \
+		&& make -j$(getconf _NPROCESSORS_ONLN) \
+		&& make install \
+	) \
+	&& wget "https://otr.cypherpunks.ca/libotr-${LIB_OTR_VERSION}.tar.gz" -O /tmp/libotr.tar.gz \
+	&& wget "https://otr.cypherpunks.ca/libotr-${LIB_OTR_VERSION}.tar.gz.asc" -O /tmp/libotr.tar.gz.asc \
+	&& export GNUPGHOME="$(mktemp -d)" \
+# gpg: key 42C2ABAD: public key "OTR Dev Team (Signing Key) <otr@cypherpunks.ca>" imported
+	&& gpg --keyserver pgp.mit.edu --recv-keys 22DF3305DF56667CE15784FCF24DE08F42C2ABAD \
+	&& gpg --batch --verify /tmp/libotr.tar.gz.asc /tmp/libotr.tar.gz \
+	&& rm -r "$GNUPGHOME" /tmp/libotr.tar.gz.asc \
 	&& mkdir -p /usr/src/libotr \
 	&& tar -xzf /tmp/libotr.tar.gz -C /usr/src/libotr --strip-components 1 \
-	&& rm /tmp/libotr.tar.gz* \
-	&& cd /usr/src/libotr \
-	&& ./configure --with-pic --prefix=/usr \
-	&& make \
-	&& make install \
+	&& rm /tmp/libotr.tar.gz \
+	&& ( \
+		cd /usr/src/libotr \
+		&& ./configure \
+			--with-pic \
+			--prefix=/usr \
+		&& make \
+		&& make install \
+	) \
 	&& mkdir -p /usr/src/irssi-otr \
-	&& curl -sSL "https://github.com/cryptodotis/irssi-otr/archive/v${IRSSI_OTR_VERSION}.tar.gz" | tar -vxz --strip-components 1 -C /usr/src/irssi-otr \
-	&& cd /usr/src/irssi-otr \
-	&& ./bootstrap \
-	&& ./configure --prefix="/usr" \
-	&& make \
-	&& make install \
-	&& rm -rf /usr/src/irssi* \
-	&& rm -rf /usr/src/libotr* \
-	&& apt-get purge -y --auto-remove $buildDeps
+	&& wget "https://github.com/cryptodotis/irssi-otr/archive/v${IRSSI_OTR_VERSION}.tar.gz" -O /tmp/irssi-otr.tar.gz \
+	&& mkdir -p /usr/src/irssi-otr \
+	&& tar -xf /tmp/irssi-otr.tar.gz -C /usr/src/irssi-otr --strip-components 1 \
+	&& rm /tmp/irssi-otr.tar.gz \
+	&& ( \
+		cd /usr/src/irssi-otr \
+		&& wget "$PATCH_FOR_IRSSI_OTR" -O patch.diff \
+		&& patch -p1 < patch.diff \
+		&& ./bootstrap \
+		&& ./configure \
+			--prefix=/usr \
+		&& make \
+		&& make install \
+	) \
+	&& rm -rf /usr/src/irssi-$IRSSI_VERSION \
+	&& rm -rf /usr/src/libotr \
+	&& rm -rf /usr/src/irssi-otr \
+	&& runDeps="$( \
+		scanelf --needed --nobanner --recursive /usr \
+			| awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
+			| sort -u \
+			| xargs -r apk info --installed \
+			| sort -u \
+	)" \
+	&& apk add --no-cache --virtual .irssi-rundeps $runDeps perl-libwww \
+	&& apk del .build-deps
 
 WORKDIR $HOME
+VOLUME $HOME/.irssi
 
 USER user
 CMD ["irssi"]
diff --git a/mesos-dev/Dockerfile b/mesos-dev/Dockerfile
index cbc0ef6..35cd289 100644
--- a/mesos-dev/Dockerfile
+++ b/mesos-dev/Dockerfile
@@ -32,9 +32,10 @@ RUN apt-get update && apt-get install -y \
 	--no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
-ADD https://get.docker.com/builds/Linux/x86_64/docker-latest /usr/bin/docker
 
-RUN chmod +x /usr/bin/docker \
+RUN curl -sSL https://get.docker.com/builds/Linux/x86_64/docker-latest.tgz | tar -xvz \
+		-C /usr/bin --strip-components 1 \
+	&& chmod +x /usr/bin/docker* \
 	&& echo "docker daemon -D -s overlay" > $HOME/.bash_history
 
 ENV CCACHE_MAXSIZE=20G CCACHE_CPP2=true CCACHE_HARDLINK=true CCACHE_SLOPPINESS=file_macro,time_macros,include_file_mtime,include_file_ctime,file_stat_matches CC=/usr/bin/clang CXX=/usr/bin/clang++