diff --git a/build.go b/build.go
index 5e7832539..645b7a615 100644
--- a/build.go
+++ b/build.go
@@ -193,6 +193,9 @@ func setBuildEnv() {
 	} else {
 		os.Setenv("GOARCH", goarch)
 	}
+	if goarch == "386" {
+		os.Setenv("GO386", "387")
+	}
 }
 
 func assets() {
diff --git a/build.sh b/build.sh
index 540ee7c98..0f49069a4 100755
--- a/build.sh
+++ b/build.sh
@@ -2,238 +2,80 @@
 set -euo pipefail
 IFS=$'\n\t'
 
-export COPYFILE_DISABLE=true
-export GO386=387 # Don't use SSE on 32 bit builds
-
-distFiles=(README.md LICENSE CONTRIBUTORS) # apart from the binary itself
-
-# replace "...-12-g123abc" with "...+12-g123abc" to remain semver compatible-ish
-version=$(git describe --always --dirty)
-version=$(echo "$version" | sed 's/-\([0-9]\{1,3\}-g[0-9a-f]\{5,10\}\)/+\1/')
-
-date=$(git show -s --format=%ct)
-user=$(whoami)
-host=$(hostname)
-host=${host%%.*}
-bldenv=${ENVIRONMENT:-default}
-ldflags="-w -X main.Version $version -X main.BuildStamp $date -X main.BuildUser $user -X main.BuildHost $host -X main.BuildEnv $bldenv"
-
-check() {
-	if ! command -v godep >/dev/null ; then
-		echo "Error: no godep. Try \"$0 setup\"."
-		exit 1
-	fi
-}
-
-build() {
-	check
-	godep go build $* -ldflags "$ldflags" ./cmd/syncthing
-}
-
-assets() {
-	check
-	godep go run cmd/genassets/main.go gui > auto/gui.files.go
-}
-
-test-cov() {
-	echo "mode: set" > coverage.out
-	fail=0
-
-	for dir in $(go list ./...) ; do
-		godep go test -coverprofile=profile.out $dir || fail=1
-		if [ -f profile.out ] ; then
-			grep -v "mode: set" profile.out >> coverage.out
-			rm profile.out
-        fi
-    done
-
-   exit $fail
-}
-
-test() {
-	check
-	go vet ./...
-	godep go test -cpu=1,2,4 $* ./...
-}
-
-tarDist() {
-	name="$1"
-	rm -rf "$name"
-	mkdir -p "$name"
-	cp syncthing "${distFiles[@]}" "$name"
-	tar zcvf "$name.tar.gz" "$name"
-	rm -rf "$name"
-}
-
-zipDist() {
-	name="$1"
-	rm -rf "$name"
-	mkdir -p "$name"
-	for f in "${distFiles[@]}" ; do
-		GOARCH="" GOOS="" go run cmd/todos/main.go < "$f" > "$name/$f.txt"
-	done
-	cp syncthing.exe "$name"
-	zip -r "$name.zip" "$name"
-	rm -rf "$name"
-}
-
-deps() {
-	check
-	godep save ./cmd/...
-}
-
-setup() {
-	go get -v code.google.com/p/go.tools/cmd/cover
-	go get -v code.google.com/p/go.tools/cmd/vet
-	go get -v github.com/mattn/goveralls
-	go get -v github.com/tools/godep
-}
-
-xdr() {
-	for f in discover/packets files/leveldb protocol/message ; do
-		go run "$(godep path)/src/github.com/calmh/xdr/cmd/genxdr/main.go" -- "${f}.go" > "${f}_xdr.go"
-	done
-}
-
-translate() {
-	pushd gui
-	go run ../cmd/translate/main.go lang-en.json index.html > lang-en-new.json
-	mv lang-en-new.json lang-en.json
-	popd
-}
-
-transifex() {
-	pushd gui
-	go run ../cmd/transifexdl/main.go
-	popd
-	assets
-}
-
-build-all() {
-	rm -f *.tar.gz *.zip
-	test -short
-	assets
-
-	rm -rf bin Godeps/_workspace/pkg $GOPATH/pkg/*/github.com/syncthing
-	for os in darwin-amd64 freebsd-amd64 freebsd-386 linux-amd64 linux-386 windows-amd64 windows-386 ; do
-		export GOOS=${os%-*}
-		export GOARCH=${os#*-}
-
-		build $*
-
-		name="syncthing-${os/darwin/macosx}-$version"
-		case $GOOS in
-			windows)
-				zipDist "$name"
-				rm -f syncthing.exe
-				;;
-			*)
-				tarDist "$name"
-				rm -f syncthing
-				;;
-		esac
-	done
-
-	export GOOS=linux
-	export GOARCH=arm
-
-	origldflags="$ldflags"
-
-	export GOARM=7
-	ldflags="$origldflags -X main.GoArchExtra v7"
-	build $*
-	tarDist "syncthing-linux-armv7-$version"
-
-	export GOARM=6
-	ldflags="$origldflags -X main.GoArchExtra v6"
-	build $*
-	tarDist "syncthing-linux-armv6-$version"
-
-	export GOARM=5
-	ldflags="$origldflags -X main.GoArchExtra v5"
-	build $*
-	tarDist "syncthing-linux-armv5-$version"
-}
-
 case "${1:-default}" in
 	default)
-		if [[ $# -gt 1 ]] ; then
-			shift
-		fi
-		export GOBIN=$(pwd)/bin
-		godep go install $* -ldflags "$ldflags" ./cmd/...
+		go run build.go
 		;;
 
 	clean)
-		rm -rf bin Godeps/_workspace/pkg $GOPATH/pkg/*/github.com/syncthing
-		;;
-
-	noupgrade)
-		export GOBIN=$(pwd)/bin
-		godep go install -tags noupgrade -ldflags "$ldflags" ./cmd/...
-		;;
-
-	race)
-		build -race
-		;;
-
-	guidev)
-		echo "Syncthing is already built for GUI developments. Try:"
-		echo "    STGUIASSETS=~/someDir/gui syncthing"
+		go run build.go "$1"
 		;;
 
 	test)
-		test -short
-		;;
-
-	test-cov)
-		test-cov
+		go run build.go "$1"
 		;;
 
 	tar)
-		rm -f *.tar.gz *.zip
-		test -short
-		assets
-		build
-
-		eval $(go env)
-		name="syncthing-${GOOS/darwin/macosx}-$GOARCH-$version"
-
-		tarDist "$name"
-		;;
-
-	all)
-		shift
-		build-all
-		;;
-
-	all-noupgrade)
-		shift
-		build-all -tags noupgrade
+		go run build.go "$1"
 		;;
 
 	deps)
-		deps
+		go run build.go "$1"
 		;;
 
 	assets)
-		assets
-		;;
-
-	setup)
-		setup
+		go run build.go "$1"
 		;;
 
 	xdr)
-		xdr
+		go run build.go "$1"
 		;;
 
 	translate)
-		translate
+		go run build.go "$1"
 		;;
 
 	transifex)
-		transifex
+		go run build.go "$1"
+		;;
+
+	noupgrade)
+		go run build.go -no-upgrade tar
+		;;
+
+	all)
+		go run build.go test
+
+		go run build.go -goos linux -goarch amd64 tar
+		go run build.go -goos linux -goarch 386 tar
+		go run build.go -goos linux -goarch armv5 tar
+		go run build.go -goos linux -goarch armv6 tar
+		go run build.go -goos linux -goarch armv7 tar
+
+		go run build.go -goos freebsd -goarch amd64 tar
+		go run build.go -goos freebsd -goarch 386 tar
+
+		go run build.go -goos darwin -goarch amd64 tar
+
+		go run build.go -goos windows -goarch amd64 zip
+		go run build.go -goos windows -goarch 386 zip
+		;;
+
+	setup)
+		echo "Don't worry, just build."
+		;;
+
+	test-cov)
+		echo "mode: set" > coverage.out
+		fail=0
+
+		for dir in $(go list ./...) ; do
+			godep go test -coverprofile=profile.out $dir
+			if [ -f profile.out ] ; then
+				grep -v "mode: set" profile.out >> coverage.out
+				rm profile.out
+			fi
+		done
 		;;
 
 	*)