diff --git a/docker/gitian-bitcoin-host/bin/build-bitcoin.sh b/docker/gitian-bitcoin-host/bin/build-bitcoin.sh
index 0359315..14738af 100755
--- a/docker/gitian-bitcoin-host/bin/build-bitcoin.sh
+++ b/docker/gitian-bitcoin-host/bin/build-bitcoin.sh
@@ -6,12 +6,14 @@
 ##
 #
 
-if [[ ! $# -eq 1 ]]; then
-	echo "Please specify version" 1>&2
+if [ $# -lt 2 ]; then
+	echo "Usage: build-bitcoin.sh version linux [win] [osx] [...]" 1>&2
 	exit 1
 fi
 
 VERSION="$1"
+shift
+## remaining parameters are OS targets to be build (e.g. win,osx,linux)
 
 CLONE="$HOME/bitcoin"
 
@@ -30,8 +32,15 @@ if [ ! -d bitcoin ]; then
 	cd .. || exit $?
 fi
 
-## old logic using descriptors
+## old logic using descriptors (only linux supported
 if ! verlte 0.10.0rc1 ${VERSION}; then
+
+	## make sure only Linux is being built
+	if [[ ! $# -eq 1 && "$1" != "linux" ]]; then
+		echo "For versions before 0.10.0rc1, only Linux building is supported" 1>&2
+		exit 1
+	fi
+
 	cd gitian-builder/inputs || exit $?
 	## get each dependency
 	## they are validated afterwards by gbuild
@@ -55,12 +64,17 @@ if ! verlte 0.10.0rc1 ${VERSION}; then
 		mv -v $(find build/out -type f -name '*gz' -o -name '*.zip') inputs/ || exit $?
 	done
 else
-	cd bitcoin/depends && \
-	make download-linux SOURCES_PATH="$HOME/gitian-builder/cache/common" && \
+	cd bitcoin/depends || exit $?
+	for DESC in $@; do
+		make download-${DESC} SOURCES_PATH="$HOME/gitian-builder/cache/common" || exit $?
+	done
 	cd ../.. || exit $?
 fi
 
-## proceed to build
-cd gitian-builder && \
-./bin/gbuild --commit bitcoin=v$VERSION -u bitcoin=$CLONE $CLONE/contrib/gitian-descriptors/gitian-linux.yml && \
+## proceed to build of each of the specified gitian descriptors
+cd gitian-builder || exit $?
+for DESC in $@; do
+	./bin/gbuild --commit bitcoin=v$VERSION -u bitcoin=$CLONE "$CLONE/contrib/gitian-descriptors/gitian-${DESC}.yml" || exit $?
+done
+
 echo "Build completed successfully, output files are in: ~/gitian-builder/build/out/"
diff --git a/docker/gitian-bitcoin-host/bin/sign.sh b/docker/gitian-bitcoin-host/bin/sign.sh
index a661c4b..5be7439 100755
--- a/docker/gitian-bitcoin-host/bin/sign.sh
+++ b/docker/gitian-bitcoin-host/bin/sign.sh
@@ -1,12 +1,13 @@
 #!/bin/bash
 
-if [[ ! $# -eq 2 ]]; then
-	echo "Please specify version and signer id" 1>&2
+if [ ! $# -eq 3 ]; then
+	echo "Usage: sign.sh version signer-id gitian-descriptor.yml" 1>&2
 	exit 1
 fi
 
 VERSION="$1"
 SIGNER="$2"
+DESC="$3"
 
 cd gitian-builder && \
-./bin/gsign --signer $SIGNER --release ${VERSION} --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-linux.yml
+./bin/gsign --signer $SIGNER --release ${VERSION} --destination ../gitian.sigs/ "../bitcoin/contrib/gitian-descriptors/$DESC"
diff --git a/docker/scripts/bitcoin-gitian-build.sh b/docker/scripts/bitcoin-gitian-build.sh
new file mode 100755
index 0000000..4822ea3
--- /dev/null
+++ b/docker/scripts/bitcoin-gitian-build.sh
@@ -0,0 +1,96 @@
+#!/bin/bash
+
+if [ $# -lt 1 ]; then
+	echo "Usage: gitian-build.sh linux [win] [osx] [...]" 1>&2
+	exit 1
+fi
+
+PARALLEL=""
+if type coshell 2>/dev/null >/dev/null; then
+	PARALLEL="coshell"
+else
+	if type parallel 2>/dev/null >/dev/null; then
+		PARALLEL="parallel -j$#"
+	else
+		echo "Please install coshell (https://github.com/gdm85/coshell) or GNU Parallel (https://www.gnu.org/software/parallel/)" 1>&2
+		exit 2
+	fi
+fi
+
+set -o pipefail && \
+MOSTRECENT="$(curl -s https://api.github.com/repos/bitcoin/bitcoin/tags | jq -r '.[0].name' | awk '{ print substr($0, 2) }')" || exit $?
+
+## run all necessary containers, detached
+function run_all() {
+	local OS
+
+	for OS in "$@"; do
+		echo "docker run -d --privileged gdm85/gitian-bitcoin-host"
+	done | $PARALLEL
+}
+
+## run a simple test to detect if SSH works
+function loop_wait_all() {
+	local RETRIES="$1"
+	shift
+	while [ $RETRIES -gt 0 ]; do
+		wait_all "$@" && break
+		sleep 1
+		let RETRIES-=1
+	done
+	return 0
+}
+
+function wait_all() {
+	local CID
+	local IP
+
+	for CID in "$@"; do
+		IP=$(docker inspect --format '{{ .NetworkSettings.IPAddress }}' $CID) && \
+	    	echo "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no debian@$IP true" || return $?
+	done | $PARALLEL 2>/dev/null
+}
+
+function build_all() {
+	local ALL=($@)
+	local LEN=$(($#/2))
+	local CREATED=("${ALL[@]:0:$LEN}")
+	local OSES=("${ALL[@]:$LEN}")
+	local CID
+	local OS
+	local IP
+
+	local I=0
+	for CID in $CREATED; do
+		OS=${OSES[$I]}
+#		IP=$(docker inspect --format '{{ .NetworkSettings.IPAddress }}' $CID) && \
+#	    	echo -n "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no debian@$IP " && \
+#		echo "./build-bitcoin.sh $MOSTRECENT ${OS}" || return $?
+		echo "docker-enter $CID su -c 'cd /home/debian && ./build-bitcoin.sh $MOSTRECENT ${OS}' debian"
+		let I+=1
+	done | $PARALLEL
+}
+
+function copy_all() {
+	local OS
+	for OS in "$@"; do
+		echo "docker cp ${CID}:/home/debian/gitian-build/build/out built-${OS}"
+	done | $PARALLEL
+}
+
+CREATED="$(run_all $@ | tr '\n' ' ')" && \
+echo loop_wait_all 5 $CREATED && \
+echo "Containers are online: $CREATED, building bitcoin v$MOSTRECENT" && \
+build_all $CREATED $@ && \
+copy_all $CREATED
+RV=$?
+
+## cleanup
+#echo "Cleaning up created containers..."
+#for CID in $CREATED; do
+#	docker stop $CID
+#	docker rm $CID
+#done
+
+## return build exit code
+exit $RV