diff --git a/Dockerfile.jenkins b/Dockerfile.jenkins
index 34d7dff..ac78374 100644
--- a/Dockerfile.jenkins
+++ b/Dockerfile.jenkins
@@ -1,2 +1,2 @@
-FROM debian:trixie-slim
-RUN apt-get update && apt-get install -y make docker.io
+FROM alpine
+RUN apk add make docker
diff --git a/Dockerfile.test b/Dockerfile.test
index b7c80a7..a1db2b1 100644
--- a/Dockerfile.test
+++ b/Dockerfile.test
@@ -1,44 +1,26 @@
 ARG SCHEME=chibi
-ARG IMAGE=chibi:head
-
-FROM docker.io/debian:trixie AS build
-RUN apt-get update && apt-get install -y build-essential git ca-certificates curl xz-utils chicken-bin
-RUN chicken-install r7rs
-
-WORKDIR /build
-RUN git clone https://github.com/ashinn/chibi-scheme.git --depth=1
-RUN curl -O https://gitlab.com/-/project/6808260/uploads/094ce726ce3c6cf8c14560f1e31aaea0/akku-1.1.0.amd64-linux.tar.xz
-RUN tar -xf akku*.tar.xz && mv akku-1.1.0.amd64-linux akku
-RUN git clone https://codeberg.org/retropikzel/scheme-venv.git --depth=1
-RUN git clone https://codeberg.org/retropikzel/compile-scheme.git --depth=1
-
-WORKDIR /build/chibi-scheme
-RUN make
-RUN make install
-
-WORKDIR /build/compile-scheme
-RUN mkdir -p /root/.snow && echo "()" > /root/.snow/config.scm
-RUN snow-chibi install --impls=chicken --always-yes retropikzel.system
-RUN snow-chibi install --impls=chicken --always-yes srfi.170
-RUN make build-chicken
-
-
+FROM docker.io/schemers/${SCHEME}
 ARG SCHEME=chibi
-FROM docker.io/schemers/${IMAGE}
+ENV COMPILE_R7RS=${SCHEME}
 
-COPY --from=build /build /build
-RUN apt-get update && apt-get install -y make curl libcurl4-openssl-dev emscripten
-WORKDIR /build/chibi-scheme
-RUN make install
-WORKDIR /build/akku
-RUN bash install.sh
-RUN ln -sf /root/.local/bin/akku /usr/local/bin/akku
-WORKDIR /build/scheme-venv
-RUN make install
-WORKDIR /build/compile-scheme
-RUN make install
+RUN apt-get update && apt-get install -y \
+    build-essential libffi-dev libcurl4-openssl-dev curl guile-3.0 \
+    git ca-certificates
+
+COPY --from=schemers/loko:head /usr/local /usr/loko
+RUN cp -r /usr/loko/* /usr/local/
+COPY --from=schemers/chibi:head /usr/local /usr/chibi
+RUN cp -r /usr/chibi/* /usr/local/
+RUN ldconfig
+
+ADD https://codeberg.org/retropikzel/compile-r7rs/raw/branch/main/compile-r7rs .
+RUN install compile-r7rs /usr/local/bin/compile-r7rs
 
 RUN mkdir -p /root/.snow && echo "()" > /root/.snow/config.scm
+
+RUN snow-chibi install --impls=${SCHEME} --skip-tests?=1 --always-yes srfi.64
+RUN snow-chibi install --impls=${SCHEME} --skip-tests?=1 --always-yes retropikzel.ctrf
+
 WORKDIR /workdir
 ARG SCHEME=chibi
 ENV COMPILE_R7RS=${SCHEME}
diff --git a/Makefile b/Makefile
index 67fbc33..8a340aa 100644
--- a/Makefile
+++ b/Makefile
@@ -3,20 +3,14 @@ RNRS=r7rs
 LIBRARY=ctrf
 VENV=venv-${SCHEME}-${RNRS}-${LIBRARY}
 AUTHOR=retropikzel
+PKG=${AUTHOR}-${LIBRARY}-${VERSION}.tgz
 
 LIBRARY_FILE=retropikzel/${LIBRARY}.sld
 VERSION=$(shell cat retropikzel/${LIBRARY}/VERSION)
 DESCRIPTION=$(shell head -n1 retropikzel/${LIBRARY}/README.md)
 README=retropikzel/${LIBRARY}/README.html
 TESTFILE=retropikzel/${LIBRARY}/test.scm
-
-PKG=${AUTHOR}-${LIBRARY}-${VERSION}.tgz
-MOUTHPKG=${AUTHOR}-mouth-$(shell cat retropikzel/mouth/VERSION).tgz
-
-DOCKERIMG=${SCHEME}:head
-ifeq "${SCHEME}" "chicken"
-DOCKERIMG="chicken:5"
-endif
+TEST_DEPENDS=srfi.64 retropikzel.mouth retropikzel.ctrf
 
 all: build
 
@@ -24,65 +18,46 @@ build: retropikzel/${LIBRARY}/LICENSE retropikzel/${LIBRARY}/VERSION retropikzel
 	echo "<pre>$$(cat retropikzel/${LIBRARY}/README.md)</pre>" > ${README}
 	snow-chibi package --version=${VERSION} --authors=${AUTHOR} --doc=${README} --description="${DESCRIPTION}" ${LIBRARY_FILE}
 
-install:
-	snow-chibi install --impls=${SCHEME} ${SNOW_CHIBI_ARGS} ${PKG}
+index:
+	snow-chibi index ${PKG}
+
+install: index
+	snow-chibi install --impls=${SCHEME} --always-yes retropikzel.${LIBRARY}
 
 uninstall:
-	-snow-chibi remove --impls=${SCHEME} ${PKG}
+	snow-chibi remove --impls=${SCHEME} retropikzel.${LIBRARY}
 
-logs:
+test: logs build index
 	mkdir -p logs
+	# tmpdir
+	mkdir -p .tmp
+	# r6rs testfiles
+	printf "#!r6rs\n(import (rnrs) (srfi :64) (srfi :98) (retropikzel mouth) (retropikzel ctrf) (retropikzel ${LIBRARY}))" > .tmp/test.sps
+	echo "(test-runner-current (ctrf-runner))" >> .tmp/test.sps
+	cat ${TESTFILE} >> .tmp/test.sps
+	# r7rs testfiles
+	echo "(import (scheme base) (scheme write) (scheme read) (scheme char) (scheme file) (scheme process-context) (retropikzel mouth) (srfi 64) (retropikzel ctrf) (retropikzel ${LIBRARY}))" > .tmp/test.scm
+	echo "(test-runner-current (ctrf-runner))" >> .tmp/test.scm
+	cat ${TESTFILE} >> .tmp/test.scm
+	# r6rs
+	if [ "${RNRS}" = "r6rs" ]; then \
+		cd .tmp \
+		&& snow-chibi install --impls=${SCHEME} --skip-tests?=1 --always-yes --install-source-dir=. --install-library-dir=. ${TEST_DEPENDS} retropikzel.${LIBRARY} \
+		&& akku install akku-r7rs 2> /dev/null \
+		&& COMPILE_R7RS=${SCHEME} compile-r7rs -I .akku/lib -o test test.sps; \
+	fi
+	# r7rs
+	if [ "${RNRS}" = "r7rs" ]; then \
+		cd .tmp \
+		&& snow-chibi install --impls=${SCHEME} retropikzel.${LIBRARY} \
+		&& COMPILE_R7RS=${SCHEME} CSC_OPTIONS="-L -lcurl" compile-r7rs -o test test.scm; \
+	fi
+	cd .tmp && ./test
+	mv .tmp/*.json logs/ || true
 
-snow:
-	snow-chibi install --impls=generic --skip-tests?=1 --always-yes --install-source-dir=snow --install-library-dir=snow retropikzel.ctrf || true
-	snow-chibi install --impls=generic --skip-tests?=1 --always-yes --install-source-dir=snow --install-library-dir=snow srfi.64 || true
-
-${VENV}:
-	scheme-venv ${SCHEME} ${VENV}
-	if [ "${RNRS}" = "r7rs" ]; then ${VENV}/bin/snow-chibi install --always-yes srfi.64; fi
-	if [ "${RNRS}" = "r7rs" ]; then ${VENV}/bin/snow-chibi install --always-yes retropikzel.mouth; fi
-	if [ "${RNRS}" = "r7rs" ]; then ${VENV}/bin/snow-chibi install --always-yes retropikzel.ctrf; fi
-	if [ "${SCHEME}-${RNRS}" = "mosh-r7rs" ]; then ${VENV}/bin/snow-chibi install --always-yes srfi.64; fi
-	if [ "${SCHEME}" = "chezscheme" ]; then ${VENV}/bin/akku install akku-r7rs chez-srfi; fi
-	if [ "${SCHEME}" = "ikarus" ]; then ${VENV}/bin/akku install akku-r7rs chez-srfi; fi
-	if [ "${SCHEME}" = "ironscheme" ]; then ${VENV}/bin/akku install akku-r7rs chez-srfi; fi
-	if [ "${SCHEME}" = "racket" ]; then ${VENV}/bin/akku install akku-r7rs chez-srfi; fi
-
-run-test-venv: ${VENV} logs build
-	echo "(import (scheme base) (scheme write) (scheme read) (scheme char) (scheme file) (scheme process-context) (retropikzel mouth) (srfi 64) (retropikzel ctrf) (retropikzel ${LIBRARY}))" > ${VENV}/test.scm
-	echo "(test-runner-current (ctrf-runner))" >> ${VENV}/test.scm
-	printf "#!r6rs\n(import (rnrs) (srfi :64) (srfi :98) (retropikzel mouth) (retropikzel ${LIBRARY}))" > ${VENV}/test.sps
-	cat ${TESTFILE} >> ${VENV}/test.scm
-	cat ${TESTFILE} >> ${VENV}/test.sps
-	if [ "${RNRS}" = "r6rs" ]; then cp -r retropikzel ${VENV}/lib/; fi
-	if [ "${RNRS}" = "r6rs" ]; then ${VENV}/bin/akku install; fi
-	if [ "${RNRS}" = "r7rs" ]; then ${VENV}/bin/snow-chibi install ${PKG}; fi
-	if [ "${RNRS}" = "r6rs" ]; then ${VENV}/bin/scheme-compile ${VENV}/test.sps; fi
-	if [ "${RNRS}" = "r7rs" ]; then CSC_OPTIONS="-L -lcurl" ${VENV}/bin/scheme-compile ${VENV}/test.scm; fi
-	cd ${VENV} && ./test
-	mv ${VENV}/*.json logs/ || true
-
-run-test-system: logs snow build
-	printf "#!r6rs\n(import (rnrs) (srfi :64) (srfi :98) (retropikzel mouth) (retropikzel ctrf) (retropikzel ${LIBRARY}))" > run-test.sps
-	echo "(test-runner-current (ctrf-runner))" >> run-test.sps
-	cat ${TESTFILE} >> run-test.sps
-	echo "(import (scheme base) (scheme write) (scheme read) (scheme char) (scheme file) (scheme process-context) (retropikzel mouth) (srfi 64) (retropikzel ctrf) (retropikzel ${LIBRARY}))" > run-test.scm
-	echo "(test-runner-current (ctrf-runner))" >> run-test.scm
-	cat ${TESTFILE} >> run-test.scm
-	if [ "${RNRS}" = "r6rs" ]; then akku install akku-r7rs; fi
-	if [ "${RNRS}" = "r7rs" ]; then snow-chibi install --impls=${SCHEME} --always-yes srfi.64; fi
-	if [ "${RNRS}" = "r7rs" ]; then snow-chibi install --impls=${SCHEME} --always-yes retropikzel.mouth; fi
-	if [ "${RNRS}" = "r7rs" ]; then snow-chibi install --impls=${SCHEME} --always-yes retropikzel.ctrf; fi
-	if [ "${RNRS}" = "r7rs" ]; then snow-chibi install --impls=${SCHEME} ${PKG}; fi
-	rm -rf run-test
-	if [ "${RNRS}" = "r6rs" ]; then COMPILE_R7RS=${SCHEME} compile-scheme -I .akku/lib run-test.sps; fi
-	if [ "${RNRS}" = "r7rs" ]; then COMPILE_R7RS=${SCHEME} CSC_OPTIONS="-L -lcurl" compile-scheme run-test.scm; fi
-	./run-test
-	mv *.json logs/ || true
-
-run-test-docker:
-	docker build --build-arg IMAGE=${DOCKERIMG} -f Dockerfile.test --tag=scheme-libraries-${SCHEME} .
-	docker run -v "${PWD}/logs:/workdir/logs" -w /workdir scheme-libraries-${SCHEME} sh -c "make SCHEME=${SCHEME} RNRS=${RNRS} LIBRARY=${LIBRARY} run-test-system"
+test-docker:
+	docker build --build-arg IMAGE=${IMAGE} --build-arg SCHEME=${SCHEME} -f Dockerfile.test --tag=${SCHEME}-testing .
+	docker run -v "${PWD}/logs:/workdir/logs" -w /workdir ${SCHEME}-testing sh -c "make SCHEME=${SCHEME} RNRS=${RNRS} LIBRARY=${LIBRARY} test"
 
 retropikzel/wasm/plus.wasm: retropikzel/wasm/plus.c
 	emcc -o retropikzel/wasm/plus.js retropikzel/wasm/plus.c
diff --git a/retropikzel/mouth.sld b/retropikzel/mouth.sld
index 9b9b254..f3da5e2 100644
--- a/retropikzel/mouth.sld
+++ b/retropikzel/mouth.sld
@@ -4,5 +4,8 @@
           (scheme write)
           (scheme file))
   (export slurp
-          spit)
+          spit
+          ;slurb ; TODO Read whole file as bytevector
+          ;sbit ; TODO Write bytevector into file
+          )
   (include "mouth.scm"))