diff --git a/Dockerfile b/Dockerfile
index 88914fec..e383729c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,10 @@ ARG VERSION
 WORKDIR /app
 COPY ./ ./
 
-RUN ./build.sh --go-os linux --go-arch amd64 --version "${VERSION:-}"
+ENV LD_VERSION="-X github.com/spinnaker/spin/version.Version=${VERSION}"
+
+RUN GOARCH=amd64 GOOS=linux CGO_ENABLED=0 go build \
+    -ldflags "${LD_VERSION}" .
 
 FROM alpine
 
diff --git a/Dockerfile.slim b/Dockerfile.slim
deleted file mode 100644
index 41a612f5..00000000
--- a/Dockerfile.slim
+++ /dev/null
@@ -1,9 +0,0 @@
-FROM alpine
-
-RUN apk update \
-    && apk add ca-certificates \
-    && rm -rf /var/cache/apk/*
-
-COPY spin /usr/local/bin
-
-CMD ["/bin/sh"]
diff --git a/build.sh b/build.sh
deleted file mode 100755
index 7085de73..00000000
--- a/build.sh
+++ /dev/null
@@ -1,83 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-set -x
-
-VERSION=
-RELEASE_PHASE=
-go_os=
-go_arch=
-
-function process_args() {
-  while [[ $# -gt 0 ]]
-  do
-    local key="$1"
-    shift
-    case ${key} in
-      --go-arch)
-        go_arch="$1"
-        shift
-        ;;
-      --go-os)
-        go_os="$1"
-        shift
-        ;;
-      --release-phase)
-        RELEASE_PHASE="$1"
-        shift
-        ;;
-      --version)
-        VERSION="$1"
-        shift
-        ;;
-      --help|-help|-h)
-        print_usage
-        exit 0
-        ;;
-      *)
-        echo "ERROR: Unknown argument '$key'"
-        exit -1
-    esac
-  done
-}
-
-function print_usage() {
-    cat <<EOF
-usage: $0 --version <version>
-      [--go-arch <arch>] [--go-os <os>]
-      [--release-phase <phase>]
-
-
-    --go-arch <arg>              Architecture to build the binary for.
-
-    --go-os <arg>                OS distribution to build for binary for.
-
-    --release-phase <arg>        Release phase to decorate the version with.
-
-    --version <arg>              Version to build the 'spin' binaries with.
-EOF
-}
-
-process_args "$@"
-
-if [[ -z "$VERSION" ]]; then
-    echo "No Version specified, using git hash at head."
-    VERSION="$(git rev-parse HEAD)"
-fi
-
-if [[ ! -z "$go_arch" ]]; then
-    export GOARCH="$go_arch"
-fi
-
-if [[ ! -z "$go_os" ]]; then
-    export GOOS="$go_os"
-fi
-
-LD_FLAGS=<<EOF
--X github.com/spinnaker/spin/version.Version=${VERSION} \
--X github.com/spinnaker/spin/version.ReleasePhase=${RELEASE_PHASE}"
-EOF
-
-go clean
-go get -d -v
-CGO_ENABLED=0 go build -ldflags "${LD_FLAGS}" .
diff --git a/version/version.go b/version/version.go
index 006b688a..b92e1b1f 100644
--- a/version/version.go
+++ b/version/version.go
@@ -14,25 +14,13 @@
 
 package version
 
-import (
-	"fmt"
-)
-
 // Main version number being run right now.
-var Version = ""
-
-// A pre-release marker for the version. If this is an empty string,
-// then the release is a final release. Otherwise this is a pre-release
-// version e.g. "dev", "alpha", etc.
-var ReleasePhase = "dev"
+var Version = "dev"
 
 // User Agent name set in requests.
 const UserAgent = "Spin-CLI"
 
 // String prints the version of the Spin CLI.
 func String() string {
-	if ReleasePhase != "" {
-		return fmt.Sprintf("%s-%s", Version, ReleasePhase)
-	}
 	return Version
 }