diff --git a/.travis.yml b/.travis.yml
index b201781..4c97142 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,8 +15,8 @@ env:
   - GO_BOOTSTRAP_VERSION=1.7.5
   - GOPATH="${HOME}/gopath"
   - PATH="${HOME}/bin:${PATH}"
-  - SHELLCHECK_URL="https://s3.amazonaws.com/travis-blue-public/binaries/ubuntu/14.04/x86_64/shellcheck-0.4.4.tar.bz2"
-  - SHFMT_URL="https://github.com/mvdan/sh/releases/download/v1.0.0/shfmt_v1.0.0_linux_amd64"
+  - SHELLCHECK_URL="https://s3.amazonaws.com/travis-blue-public/binaries/ubuntu/14.04/x86_64/shellcheck-0.4.6.tar.bz2"
+  - SHFMT_URL="https://github.com/mvdan/sh/releases/download/v1.3.1/shfmt_v1.3.1_linux_amd64"
   matrix:
   - TARGET=native GO_VERSIONS="$(sed -n -e '/^[^#]/p' < .testdata/sample-binary-$UNAME) $(sed -n -e '/^[^#]/p' < .testdata/source-$UNAME)"
   - TARGET=arm GO_VERSIONS="master"
@@ -34,9 +34,10 @@ script:
     curl -sSL "${SHELLCHECK_URL}" | tar -C "${HOME}/bin" -xjf -;
     shellcheck --version;
   fi
-- if ! command -v shfmt ; then
-    curl -sSL "${SHFMT_URL}" -o "${HOME}/bin/shfmt" ;
-    chmod +x "${HOME}/bin/shfmt" ;
+- if [ $UNAME = linux ] && [[ $(shfmt -version 2>/dev/null) != v1.3.1 ]] ; then
+    curl -sSL "${SHFMT_URL}" -o "${HOME}/bin/shfmt";
+    chmod +x "${HOME}/bin/shfmt";
+    shfmt -version;
   fi
 - if [ $UNAME = linux ]; then make lint; fi
 - git diff --exit-code
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 30aa5f7..e956057 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,29 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [Unreleased]
+
+### Added
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
+## [1.2.0] - 2017-07-09
+
+### Added
+- support for `stable` alias which auto-updates to point at latest release
+- flag/command `-k|--known|known` to list known go versions
+
+### Fixed
+- always set `GOROOT` when installing official binaries
+
 ## [1.1.0] - 2016-12-07
 ### Added
 - Windows binary downloads
@@ -80,7 +103,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 - Initial release!
 
-[Unreleased]: https://github.com/travis-ci/gimme/compare/v1.1.0...HEAD
+[Unreleased]: https://github.com/travis-ci/gimme/compare/v1.2.0...HEAD
+[1.2.0]: https://github.com/travis-ci/gimme/compare/v1.1.0...v1.2.0
 [1.1.0]: https://github.com/travis-ci/gimme/compare/v1.0.4...v1.1.0
 [1.0.0]: https://github.com/travis-ci/gimme/compare/v0.2.4...v1.0.0
 [0.2.4]: https://github.com/travis-ci/gimme/compare/v0.2.3...v0.2.4
diff --git a/gimme b/gimme
index 973d775..ce495c1 100755
--- a/gimme
+++ b/gimme
@@ -49,9 +49,9 @@ set -o pipefail
 
 [[ ${GIMME_DEBUG} ]] && set -x
 
-GIMME_VERSION="v1.1.0"
+GIMME_VERSION="v1.2.0"
 GIMME_COPYRIGHT="Copyright (c) 2016 Dan Buch, Tianon Gravi, Travis CI GmbH"
-GIMME_LICENSE_URL="https://raw.githubusercontent.com/travis-ci/gimme/v1.1.0/LICENSE"
+GIMME_LICENSE_URL="https://raw.githubusercontent.com/travis-ci/gimme/v1.2.0/LICENSE"
 export GIMME_VERSION
 export GIMME_COPYRIGHT
 export GIMME_LICENSE_URL
@@ -101,7 +101,7 @@ _binary() {
 	urls=(
 		"${GIMME_DOWNLOAD_BASE}/go${version}.${GIMME_OS}-${arch}.tar.gz"
 	)
-	if [[ "${GIMME_OS}" = 'darwin' && "${GIMME_BINARY_OSX}" ]]; then
+	if [[ "${GIMME_OS}" == 'darwin' && "${GIMME_BINARY_OSX}" ]]; then
 		urls=(
 			"${GIMME_DOWNLOAD_BASE}/go${version}.${GIMME_OS}-${arch}-${GIMME_BINARY_OSX}.tar.gz"
 			"${urls[@]}"
@@ -155,8 +155,8 @@ _checkout() {
 		git reset -q --hard "origin/${1}" \
 			|| git reset -q --hard "origin/go${1}" \
 			|| { [ "${1}" = 'tip' ] && git reset -q --hard origin/master; } \
-				|| git reset -q --hard "refs/tags/${1}" \
-				|| git reset -q --hard "refs/tags/go${1}"
+			|| git reset -q --hard "refs/tags/${1}" \
+			|| git reset -q --hard "refs/tags/go${1}"
 	} 2>/dev/null)
 }
 
@@ -253,12 +253,12 @@ _env() {
 	#   Tools like `gimme` are the reason that GOROOT-in-env exists.
 
 	echo
-	if [[ "$(GOROOT="${1}" "${1}/bin/go" env GOHOSTOS)" = "${GIMME_OS}" ]]; then
+	if [[ "$(GOROOT="${1}" "${1}/bin/go" env GOHOSTOS)" == "${GIMME_OS}" ]]; then
 		echo 'unset GOOS;'
 	else
 		echo 'export GOOS="'"${GIMME_OS}"'";'
 	fi
-	if [[ "$(GOROOT="${1}" "${1}/bin/go" env GOHOSTARCH)" = "${GIMME_ARCH}" ]]; then
+	if [[ "$(GOROOT="${1}" "${1}/bin/go" env GOHOSTARCH)" == "${GIMME_ARCH}" ]]; then
 		echo 'unset GOARCH;'
 	else
 		echo 'export GOARCH="'"${GIMME_ARCH}"'";'
@@ -281,7 +281,7 @@ _env_alias() {
 		return
 	fi
 
-	if [[ "$(GOROOT="${1}" "${1}/bin/go" env GOHOSTOS)" = "${GIMME_OS}" && "$(GOROOT="${1}" "${1}/bin/go" env GOHOSTARCH)" = "${GIMME_ARCH}" ]]; then
+	if [[ "$(GOROOT="${1}" "${1}/bin/go" env GOHOSTOS)" == "${GIMME_OS}" && "$(GOROOT="${1}" "${1}/bin/go" env GOHOSTARCH)" == "${GIMME_ARCH}" ]]; then
 		local dest="${GIMME_ENV_PREFIX}/go${GIMME_GO_VERSION}.env"
 		cp "${2}" "${dest}"
 		ln -sf "${dest}" "${GIMME_ENV_PREFIX}/latest.env"
@@ -390,7 +390,7 @@ _list_versions() {
 		local cleaned="${d##*/go}"
 		cleaned="${cleaned%%.${GIMME_OS}.*}"
 		echo -en "${cleaned}"
-		if [[ "${cleaned}" = "${current_version}" ]]; then
+		if [[ "${cleaned}" == "${current_version}" ]]; then
 			echo -en ' <= current' >&2
 		fi
 		echo
@@ -423,8 +423,12 @@ _realpath() {
 
 _get_curr_stable() {
 	local stable="${GIMME_VERSION_PREFIX}/stable"
+	local now_secs
+	now_secs="$(date +%s)"
+	local stable_age
+	stable_age="$(_stat_unix "${stable}" 2>/dev/null || echo 0)"
 	local age
-	age=$(($(date +%s) - $(_stat_unix "${stable}" 2>/dev/null || echo 0)))
+	age=$((now_secs - stable_age))
 
 	if [[ "${age}" -gt 86400 ]]; then
 		_update_stable "${stable}"
@@ -610,7 +614,7 @@ case "${GIMME_ARCH}" in
 			echo >&2 "try go1.5 or newer"
 			exit 1
 		fi
-		if [[ "${GIMME_HOSTOS}" = "linux" && "${GIMME_HOSTARCH}" != "${GIMME_ARCH}" ]]; then
+		if [[ "${GIMME_HOSTOS}" == "linux" && "${GIMME_HOSTARCH}" != "${GIMME_ARCH}" ]]; then
 			: "${GIMME_CC_FOR_TARGET:="aarch64-linux-gnu-gcc"}"
 		fi
 		;;
diff --git a/runtests b/runtests
index 0e6f34a..99f6480 100755
--- a/runtests
+++ b/runtests
@@ -21,7 +21,7 @@ _test_native() {
 		echo "---> eval \$(./gimme ${v})"
 		(
 			eval "$(./gimme "${v}")"
-			[[ "$(go env GOOS)" = "$(go env GOHOSTOS)" && "$(go env GOARCH)" = "$(go env GOHOSTARCH)" ]] || exit 1
+			[[ "$(go env GOOS)" == "$(go env GOHOSTOS)" && "$(go env GOARCH)" == "$(go env GOHOSTARCH)" ]] || exit 1
 		) || exit 1
 	done
 }
@@ -31,7 +31,7 @@ _test_arm() {
 		echo "---> eval \$(GIMME_OS=linux GIMME_ARCH=arm ./gimme ${v})"
 		(
 			eval "$(GIMME_OS=linux GIMME_ARCH=arm ./gimme "${v}")"
-			[[ "$(go env GOOS)" = 'linux' && "$(go env GOARCH)" = 'arm' ]] || exit 1
+			[[ "$(go env GOOS)" == 'linux' && "$(go env GOARCH)" == 'arm' ]] || exit 1
 		) || exit 1
 	done
 }
@@ -42,11 +42,11 @@ _test_arm64() {
 			echo "---> skipping ${v} because it probably won't work o_o"
 			continue
 		fi
-		if [[ "$TRAVIS_OS_NAME" = "linux" ]]; then cgo=1; else cgo=0; fi
+		if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then cgo=1; else cgo=0; fi
 		echo "---> eval \$(GIMME_OS=linux GIMME_ARCH=arm64 GIMME_CGO_ENABLED=$cgo ./gimme $v)"
 		(
 			eval "$(GIMME_OS=linux GIMME_ARCH=arm64 GIMME_CGO_ENABLED=$cgo ./gimme "${v}")"
-			[[ "$(go env GOOS)" = 'linux' && "$(go env GOARCH)" = 'arm64' ]] || exit 1
+			[[ "$(go env GOOS)" == 'linux' && "$(go env GOARCH)" == 'arm64' ]] || exit 1
 		) || exit 1
 	done
 }