diff --git a/common.crosstool b/common.crosstool
index 8f399dc..3749166 100644
--- a/common.crosstool
+++ b/common.crosstool
@@ -42,6 +42,7 @@ RUN mkdir /dockcross/crosstool \
 && /dockcross/install-crosstool-ng-toolchain.sh \
   -p "${XCC_PREFIX}" \
   -c /dockcross/crosstool-ng.config \
+  -v "${CT_VERSION}" \
 && rm -rf /dockcross/crosstool /dockcross/install-crosstool-ng-toolchain.sh
 
 # Restore our default workdir (from "dockcross/base").
diff --git a/imagefiles/install-crosstool-ng-toolchain.sh b/imagefiles/install-crosstool-ng-toolchain.sh
index 3c5034d..8c0fb7a 100755
--- a/imagefiles/install-crosstool-ng-toolchain.sh
+++ b/imagefiles/install-crosstool-ng-toolchain.sh
@@ -16,7 +16,7 @@ set -o pipefail
 # be generated underneath of here.
 ROOT=${PWD}
 
-usage() { echo "Usage: $0 -p <prefix> -c <config-path>" 1>&2; exit 1; }
+usage() { echo "Usage: $0 -p <prefix> -c <config-path> -v <version>" 1>&2; exit 1; }
 
 # Resolve our input parameters.
 #
@@ -24,7 +24,8 @@ usage() { echo "Usage: $0 -p <prefix> -c <config-path>" 1>&2; exit 1; }
 # change directories during installation.
 CT_PREFIX=
 CONFIG_PATH=
-while getopts "p:c:" o; do
+REV=
+while getopts "p:c:v:" o; do
   case "${o}" in
   p)
     CT_PREFIX=$(readlink -f ${OPTARG})
@@ -32,6 +33,9 @@ while getopts "p:c:" o; do
   c)
     CONFIG_PATH=$(readlink -f ${OPTARG})
     ;;
+  v)
+    REV=${OPTARG}
+    ;;
   *)
     usage
     ;;
@@ -48,6 +52,12 @@ if [ -z ${CONFIG_PATH} ] || [ ! -f ${CONFIG_PATH} ]; then
   usage
 fi
 
+if [ -z ${REV} ]; then
+  echo "WARNING: No version selected, use default version: crosstool-ng-1.23.0 (-v)."
+  REV=crosstool-ng-1.23.0
+fi
+
+
 ##
 # Build "crosstool-ng".
 ##
@@ -57,12 +67,17 @@ mkdir -p "${CTNG}"
 cd "${CTNG}"
 
 # Download and install the "crosstool-ng" source.
-REV=1.23.0
-curl -# -LO \
-  "https://github.com/crosstool-ng/crosstool-ng/archive/crosstool-ng-${REV}.tar.gz"
-tar -xf "crosstool-ng-${REV}.tar.gz"
-patch crosstool-ng-crosstool-ng-1.23.0/scripts/build/companion_libs/210-expat.sh -i /dockcross/crosstool-ng-expat.patch
-cd "crosstool-ng-crosstool-ng-${REV}"
+
+git clone https://github.com/crosstool-ng/crosstool-ng.git
+cd crosstool-ng
+git fetch --tags
+
+# checkout 
+git checkout ${REV}
+
+if [ ${REV} = "crosstool-ng-1.23.0" ]; then
+  patch scripts/build/companion_libs/210-expat.sh -i /dockcross/crosstool-ng-expat.patch
+fi
 
 # Bootstrap and install the tool.
 BOOTSTRAP_PREFIX="${CTNG}/prefix"
@@ -96,5 +111,6 @@ cp "${CONFIG_PATH}" "${BUILD}/.config"
 unset LD_LIBRARY_PATH
 
 # Build and install the toolchain!
-"${BOOTSTRAP_PREFIX}/bin/ct-ng" build
+# Print last 250 lines if build fail
+"${BOOTSTRAP_PREFIX}/bin/ct-ng" build || tail -250 build.log
 
diff --git a/linux-arm64/Dockerfile.in b/linux-arm64/Dockerfile.in
index bce7b35..c81fb5a 100644
--- a/linux-arm64/Dockerfile.in
+++ b/linux-arm64/Dockerfile.in
@@ -2,6 +2,9 @@ FROM dockcross/base:latest
 
 # This is for 64-bit ARM Linux machine
 
+# Crosstool-ng version
+ENV CT_VERSION crosstool-ng-1.23.0
+
 #include "common.crosstool"
 
 # The cross-compiling emulator
diff --git a/linux-armv5/Dockerfile.in b/linux-armv5/Dockerfile.in
index e146905..29192b5 100644
--- a/linux-armv5/Dockerfile.in
+++ b/linux-armv5/Dockerfile.in
@@ -4,6 +4,9 @@ MAINTAINER Matt McCormick "matt.mccormick@kitware.com"
 # This is for ARMv5 "legacy" (armel) devices which do NOT support hard float
 # VFP instructions (armhf).
 
+# Crosstool-ng version
+ENV CT_VERSION crosstool-ng-1.23.0
+
 #include "common.crosstool"
 
 # The cross-compiling emulator
diff --git a/linux-armv7/Dockerfile.in b/linux-armv7/Dockerfile.in
index 466ba2b..124e7e2 100644
--- a/linux-armv7/Dockerfile.in
+++ b/linux-armv7/Dockerfile.in
@@ -1,6 +1,9 @@
 FROM dockcross/base:latest
 MAINTAINER Matt McCormick "matt.mccormick@kitware.com"
 
+# Crosstool-ng version
+ENV CT_VERSION crosstool-ng-1.23.0
+
 # This is for 32-bit ARMv7 Linux
 #include "common.crosstool"
 
diff --git a/linux-armv7a/Dockerfile.in b/linux-armv7a/Dockerfile.in
index afa6f83..1b2f343 100644
--- a/linux-armv7a/Dockerfile.in
+++ b/linux-armv7a/Dockerfile.in
@@ -2,6 +2,10 @@ FROM dockcross/base:latest
 MAINTAINER Matt McCormick "matt.mccormick@kitware.com"
 
 # This is for 32-bit ARMv7 Linux
+
+# Crosstool-ng version
+ENV CT_VERSION crosstool-ng-1.23.0
+
 #include "common.crosstool"
 
 # The cross-compiling emulator
diff --git a/linux-mips/Dockerfile.in b/linux-mips/Dockerfile.in
index df06190..80a56b7 100644
--- a/linux-mips/Dockerfile.in
+++ b/linux-mips/Dockerfile.in
@@ -2,6 +2,9 @@ FROM dockcross/base:latest
 
 # This is for 32-bit Big-Endian MIPS devices with hard floating point enabled
 
+# Crosstool-ng version
+ENV CT_VERSION crosstool-ng-1.23.0
+
 #include "common.crosstool"
 
 # The cross-compiling emulator
diff --git a/linux-ppc64le/Dockerfile.in b/linux-ppc64le/Dockerfile.in
index 983bbc6..50d231d 100644
--- a/linux-ppc64le/Dockerfile.in
+++ b/linux-ppc64le/Dockerfile.in
@@ -1,6 +1,9 @@
 FROM dockcross/base:latest
 MAINTAINER Matt McCormick "matt.mccormick@kitware.com"
 
+# Crosstool-ng version
+ENV CT_VERSION crosstool-ng-1.23.0
+
 #include "common.crosstool"
 
 ENV CROSS_TRIPLE powerpc64le-linux-gnu
diff --git a/linux-s390x/Dockerfile.in b/linux-s390x/Dockerfile.in
index b925174..05527cd 100644
--- a/linux-s390x/Dockerfile.in
+++ b/linux-s390x/Dockerfile.in
@@ -2,6 +2,9 @@ FROM dockcross/base:latest
 
 # This is for 64-bit S390X Linux machine
 
+# Crosstool-ng version
+ENV CT_VERSION crosstool-ng-1.23.0
+
 #include "common.crosstool"
 
 # The cross-compiling emulator