diff --git a/ports/.gitignore b/ports/.gitignore
index f94d6edb..0b53aeb0 100644
--- a/ports/.gitignore
+++ b/ports/.gitignore
@@ -1 +1,3 @@
-installed
+*/*
+!*/patches/
+!*/build.sh
diff --git a/ports/build.sh b/ports/build.sh
deleted file mode 100755
index e9e4659f..00000000
--- a/ports/build.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/bash
-
-cd $(dirname $(realpath $0))
-
-if [ ! -f installed ]; then
-	exit 0
-fi
-
-while read port; do
-	${port}/build.sh
-done < installed
diff --git a/ports/curl/.gitignore b/ports/curl/.gitignore
deleted file mode 100644
index bfe0f4f1..00000000
--- a/ports/curl/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-curl-*
diff --git a/ports/curl/build.sh b/ports/curl/build.sh
index db9c81a2..1b973803 100755
--- a/ports/curl/build.sh
+++ b/ports/curl/build.sh
@@ -1,58 +1,11 @@
-#!/bin/sh
+#!/bin/bash ../install.sh
 
-if [ -z $BANAN_ARCH ]; then
-	echo  "You must set the BANAN_ARCH environment variable" >&2
-	exit 1
-fi
-
-if [ -z $BANAN_SYSROOT ]; then
-	echo  "You must set the BANAN_ARCH environment variable" >&2
-	exit 1
-fi
-
-if [ -z $BANAN_TOOLCHAIN_PREFIX ]; then
-	echo  "You must set the BANAN_TOOLCHAIN_PREFIX environment variable" >&2
-	exit 1
-fi
-
-CURL_VERSION="curl-8.8.0"
-CURL_TAR="$CURL_VERSION.tar.gz"
-CURL_URL="https://curl.se/download/$CURL_TAR"
-
-cd $(dirname $(realpath $0))
-
-if [ ! -d $CURL_VERSION ]; then
-	if [ ! -f $CURL_TAR ]; then
-		wget $CURL_URL
-	fi
-	tar xf $CURL_TAR
-
-	for patch in ./patches/*; do
-		patch -ruN -d $CURL_VERSION < "$patch"
-	done
-
-	grep -qxF curl ../installed || echo curl >> ../installed
-fi
-
-cd $CURL_VERSION
-
-export PATH="$BANAN_TOOLCHAIN_PREFIX/bin:$PATH"
-
-if [ ! -d "build-${BANAN_ARCH}" ]; then
-	mkdir -p "build-${BANAN_ARCH}"
-	cd "build-${BANAN_ARCH}"
-
-	../configure                    \
-		--host=x86_64-banan_os      \
-		--prefix=$BANAN_SYSROOT/usr \
-		--without-ssl               \
-		--disable-threaded-resolver \
-		--disable-ipv6              \
-		--disable-docs
-
-	cd ..
-fi
-
-cd "build-${BANAN_ARCH}"
-
-make -j $(nproc) && make install
+NAME='curl'
+VERSION='8.8.0'
+DOWNLOAD_URL="https://curl.se/download/curl-$VERSION.tar.gz#77c0e1cd35ab5b45b659645a93b46d660224d0024f1185e8a95cdb27ae3d787d"
+CONFIGURE_OPTIONS=(
+	'--without-ssl'
+	'--disable-threaded-resolver'
+	'--disable-ipv6'
+	'--disable-docs'
+)
diff --git a/ports/doom/.gitignore b/ports/doom/.gitignore
deleted file mode 100644
index 63242fd5..00000000
--- a/ports/doom/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-doomgeneric/
-doom1.wad
diff --git a/ports/doom/README.md b/ports/doom/README.md
deleted file mode 100644
index e026e733..00000000
--- a/ports/doom/README.md
+++ /dev/null
@@ -1 +0,0 @@
-This is a port of doomgeneric. You will need doom wad to play. Copy the wad file into sysroot and use the -iwad argument to specify wad location.
diff --git a/ports/doom/build.sh b/ports/doom/build.sh
index 9530c65f..bc481a8b 100755
--- a/ports/doom/build.sh
+++ b/ports/doom/build.sh
@@ -1,33 +1,17 @@
-#!/bin/sh
+#!/bin/bash ../install.sh
 
-if [ -z $BANAN_ARCH ]; then
-	echo  "You must set the BANAN_ARCH environment variable" >&2
-	exit 1
-fi
+NAME='doom'
+VERSION='git'
+DOWNLOAD_URL="https://github.com/ozkl/doomgeneric.git#613f870b6fa83ede448a247de5a2571092fa729d"
 
-if [ -z $BANAN_SYSROOT ]; then
-	echo  "You must set the BANAN_ARCH environment variable" >&2
-	exit 1
-fi
+build() {
+	if [ ! -f doom1.wad ]; then
+		wget https://distro.ibiblio.org/slitaz/sources/packages/d/doom1.wad || exit 1
+	fi
+	make --directory doomgeneric --file Makefile.banan_os -j$(nproc) || exit 1
+}
 
-cd $(dirname $(realpath $0))
-
-if [ ! -d "doomgeneric" ]; then
-	git clone https://github.com/ozkl/doomgeneric.git
-	cd doomgeneric
-	git checkout 613f870b6fa83ede448a247de5a2571092fa729d
-	for patch in ../patches/*; do
-		git am "$patch"
-	done
-	cd ..
-
-	grep -qxF doom ../installed || echo doom >> ../installed
-fi
-
-if [ ! -f doom1.wad ]; then
-	wget https://distro.ibiblio.org/slitaz/sources/packages/d/doom1.wad
-fi
-
-make --directory doomgeneric/doomgeneric --file Makefile.banan_os -j $(nproc)
-cp "doomgeneric/doomgeneric/build-${BANAN_ARCH}/doomgeneric" "${BANAN_SYSROOT}/bin/doom"
-cp doom1.wad $BANAN_SYSROOT/home/user/
+install() {
+	cp doomgeneric/build/doom "${BANAN_SYSROOT}/bin/" || exit 1
+	cp ./doom1.wad "$BANAN_SYSROOT/home/user/" || exit 1
+}
diff --git a/ports/doom/patches/0001-Add-support-for-banan-os.patch b/ports/doom/patches/0001-Add-support-for-banan-os.patch
index 041e21f1..62d453ed 100644
--- a/ports/doom/patches/0001-Add-support-for-banan-os.patch
+++ b/ports/doom/patches/0001-Add-support-for-banan-os.patch
@@ -29,16 +29,16 @@ index 0000000..0878148
 +	VB=@
 +endif
 +
-+CC=$(BANAN_TOOLCHAIN_PREFIX)/bin/$(BANAN_ARCH)-banan_os-gcc
-+CXX=$(BANAN_TOOLCHAIN_PREFIX)/bin/$(BANAN_ARCH)-banan_os-g++
++CC=$(BANAN_ARCH)-banan_os-gcc
++CXX=$(BANAN_ARCH)-banan_os-g++
 +CFLAGS+=-O3 -Wall -DNORMALUNIX -DLINUX -DSNDSERV -D_DEFAULT_SOURCE
 +CXXFLAGS+=$(CFLAGS) --std=c++20
 +LDFLAGS+=
 +LIBS+=-lgui -linput -lstdc++
 +
 +# subdirectory for objects
-+OBJDIR=build-$(BANAN_ARCH)
-+OUTPUT=$(OBJDIR)/doomgeneric
++OBJDIR=build
++OUTPUT=$(OBJDIR)/doom
 +
 +SRC_DOOM = dummy.o am_map.o doomdef.o doomstat.o dstrings.o d_event.o d_items.o d_iwad.o d_loop.o d_main.o d_mode.o d_net.o f_finale.o f_wipe.o g_game.o hu_lib.o hu_stuff.o info.o i_cdmus.o i_endoom.o i_joystick.o i_scale.o i_sound.o i_system.o i_timer.o memio.o m_argv.o m_bbox.o m_cheat.o m_config.o m_controls.o m_fixed.o m_menu.o m_misc.o m_random.o p_ceilng.o p_doors.o p_enemy.o p_floor.o p_inter.o p_lights.o p_map.o p_maputl.o p_mobj.o p_plats.o p_pspr.o p_saveg.o p_setup.o p_sight.o p_spec.o p_switch.o p_telept.o p_tick.o p_user.o r_bsp.o r_data.o r_draw.o r_main.o r_plane.o r_segs.o r_sky.o r_things.o sha1.o sounds.o statdump.o st_lib.o st_stuff.o s_sound.o tables.o v_video.o wi_stuff.o w_checksum.o w_file.o w_main.o w_wad.o z_zone.o w_file_stdc.o i_input.o i_video.o doomgeneric.o doomgeneric_banan_os.o
 +OBJS += $(addprefix $(OBJDIR)/, $(SRC_DOOM))
diff --git a/ports/install.sh b/ports/install.sh
new file mode 100755
index 00000000..8a1e0242
--- /dev/null
+++ b/ports/install.sh
@@ -0,0 +1,137 @@
+#!/bin/bash
+
+if (( $# != 1 )); then
+	echo "No arguments given for $0" >&2
+	exit 1
+fi
+
+BANAN_ROOT_DIR="$(dirname $(realpath $0))/.."
+source "$BANAN_ROOT_DIR/script/config.sh"
+export PATH="$BANAN_TOOLCHAIN_PREFIX/bin:$PATH"
+
+if [ ! -f "$BANAN_SYSROOT/usr/lib/libc.a" ]; then
+	pushd "$BANAN_ROOT_DIR" >/dev/null
+	./bos libc || exit 1
+	./bos install || exit 1
+	popd >/dev/null
+fi
+
+clean() {
+	find . -mindepth 1 -maxdepth 1 -not -name 'patches' -not -name 'build.sh' -exec rm -rf {} +
+}
+
+build() {
+	configure_options=("--host=$BANAN_ARCH-banan_os" "--prefix=/usr" )
+	configure_options+=(${CONFIGURE_OPTIONS[*]})
+
+	./configure ${configure_options[*]} || exit 1
+	make -j$(nproc) || exit 1
+}
+
+install() {
+	make install "DESTDIR=$BANAN_SYSROOT" || exit 1
+}
+
+source $1
+
+if [ -z $NAME ] || [ -z $VERSION ] || [ -z $DOWNLOAD_URL ]; then
+	echo  "Port does not set needed environment variables" >&2
+	exit 1
+fi
+
+for dependency in "${DEPENDENCIES[@]}"; do
+	pushd "../$dependency" >/dev/null
+	pwd
+	if ! ./build.sh; then
+		echo "Failed to install dependency '$dependency' of port '$NAME'"
+		exit 1
+	fi
+	popd >/dev/null
+done
+
+build_dir="$NAME-$VERSION-$BANAN_ARCH"
+
+if [ "$VERSION" = "git" ]; then
+	regex="(.*/.*\.git)#(.*)"
+
+	if [[ $DOWNLOAD_URL =~ $regex ]]; then
+		REPO_URL="${BASH_REMATCH[1]}"
+		COMMIT="${BASH_REMATCH[2]}"
+
+		if [ -d "$build_dir" ]; then
+			pushd $build_dir >/dev/null
+			if [ ! "$(git rev-parse HEAD)" = "$COMMIT" ]; then
+				clean
+			fi
+			popd >/dev/null
+		fi
+
+		if [ ! -d "$build_dir" ]; then
+			git clone "$REPO_URL" "$build_dir" || exit 1
+
+			pushd "$build_dir" >/dev/null
+			git checkout "$COMMIT" || exit 1
+			if [ -d patches ]; then
+				for patch in ../patches/*; do
+					git apply "$patch" || exit 1
+				done
+			fi
+			popd >/dev/null
+		fi
+	else
+		echo "Invalid format in DOWNLOAD_URL" >&2
+		exit 1
+	fi
+else
+	regex=".*/(.*\.tar\..*)#(.*)"
+	if [[ $DOWNLOAD_URL =~ $regex ]]; then
+		TAR_NAME="${BASH_REMATCH[1]}"
+		TAR_HASH="${BASH_REMATCH[2]}"
+
+		if [ -f "$TAR_NAME" ]; then
+			if ! echo "$TAR_HASH $TAR_NAME" | sha256sum --check >/dev/null; then
+				clean
+			fi
+		fi
+
+		if [ ! -f "$TAR_NAME" ]; then
+			wget "$DOWNLOAD_URL" || exit 1
+		fi
+
+		if ! echo "$TAR_HASH $TAR_NAME" | sha256sum --check >/dev/null; then
+			echo "Tar hash does not match" >&2
+			exit 1
+		fi
+
+		if [ ! -d "$build_dir" ]; then
+			tar xf "$TAR_NAME" || exit 1
+
+			: "${TAR_CONTENT:=$NAME-$VERSION}"
+			mv "$TAR_CONTENT" "$build_dir" || exit 1
+
+			if [ -d patches ]; then
+				for patch in ./patches/*; do
+					patch -ruN -d "$build_dir" < "$patch" || exit 1
+				done
+			fi
+		fi
+	else
+		echo "Invalid format in DOWNLOAD_URL" >&2
+		exit 1
+	fi
+fi
+
+needs_compile=1
+if [ -f ".compile_hash-$BANAN_ARCH" ]; then
+	cat ".compile_hash-$BANAN_ARCH" | sha256sum --check >/dev/null
+	needs_compile=$?
+fi
+
+cd "$build_dir"
+
+if (( $needs_compile )); then
+	build
+	sha256sum "$BANAN_SYSROOT/usr/lib/libc.a" > "../.compile_hash-$BANAN_ARCH"
+fi
+
+install
diff --git a/ports/update.sh b/ports/update.sh
new file mode 100755
index 00000000..ac806b6d
--- /dev/null
+++ b/ports/update.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+cd $(dirname $(realpath $0))
+
+for port in ./*/.compile_hash*; do
+	pushd $(dirname "$port") >/dev/null
+	./build.sh
+	popd >/dev/null
+done
diff --git a/script/build.sh b/script/build.sh
index 47d5e115..ca4c02f7 100755
--- a/script/build.sh
+++ b/script/build.sh
@@ -49,7 +49,7 @@ create_image () {
 	build_target all
 	build_target install
 
-	$BANAN_ROOT_DIR/ports/build.sh
+	$BANAN_ROOT_DIR/ports/update.sh
 
 	pushd $BANAN_SYSROOT >/dev/null
 	run_fakeroot tar cf ${BANAN_SYSROOT_TAR} *
@@ -121,6 +121,7 @@ case $1 in
 		;;
 	distclean)
 		rm -rf $BANAN_BUILD_DIR
+		rm $BANAN_ROOT_DIR/ports/*/.compile_hash*
 		;;
 	*)
 		build_target $1