diff --git a/Dockerfile b/Dockerfile
index c1928bb..2fc7685 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,15 +1,14 @@
-FROM ubuntu:22.04
+FROM alpine:3.17.1 AS builder
 
-ENV LC_ALL=C.UTF-8
-
-RUN apt-get update
-
-RUN apt-get install -y build-essential git autoconf
+RUN apk add --no-cache alpine-sdk
+RUN apk add --no-cache \
+    musl-dev \
+    zlib-dev \
+    tar \
+    bzip2 \
+    bash
 
 RUN mkdir -p /root/dropbear/
 WORKDIR /root/dropbear/
 
-# ./configure --disable-zlib --disable-syslog --enable-static --disable-harden
-# make PROGRAMS="dropbear dropbearconvert"
-
 ENTRYPOINT ["bash"]
diff --git a/build.sh b/build.sh
index 5ca02c3..1e93564 100755
--- a/build.sh
+++ b/build.sh
@@ -2,6 +2,6 @@
 
 docker build -t dropbearbuild -f Dockerfile .
 
-docker run --rm -t -v $(pwd):/root/dropbear dropbearbuild -c "./configure --disable-zlib --disable-syslog --enable-static --disable-harden && make PROGRAMS=\"dropbear dropbearconvert\""
+docker run --rm -t -v $(pwd):/root/dropbear dropbearbuild -c "./configure --disable-utmp --disable-wtmp --disable-lastlog --disable-zlib --disable-syslog --enable-static --disable-harden && make clean && make -j4 MULTI=1 PROGRAMS=\"dropbear dropbearconvert dropbearkey\""
 
 docker image rm dropbearbuild