diff --git a/.gitignore b/.gitignore
index 1f45afb..7a80de4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,4 +4,5 @@ venv
 *.log
 foreign
 run-test*
+.*
 
diff --git a/Makefile b/Makefile
index e91b09c..3bc8d07 100644
--- a/Makefile
+++ b/Makefile
@@ -12,81 +12,52 @@ TMPDIR=.tmp/${SCHEME}
 
 PKG=srfi-${SRFI}-${VERSION}.tgz
 
-DOCKERIMG=${SCHEME}:head
-ifeq "${SCHEME}" "chicken"
-DOCKERIMG="chicken:5"
+SFX=scm
+ifeq "${RNRS}" "r6rs"
+SFX=sps
 endif
 
-all: build
+DOCKER_TAG=head
+ifeq "${SCHEME}" "chicken"
+DOCKER_TAG=5
+endif
 
-build: srfi/${SRFI}/LICENSE srfi/${SRFI}/VERSION
+all: package
+
+package: srfi/${SRFI}/LICENSE srfi/${SRFI}/VERSION
 	echo "<pre>$$(cat srfi/${SRFI}/README.md)</pre>" > ${README}
-	snow-chibi package --version=${VERSION} --authors=${AUTHOR} --doc=${README} --description="${DESCRIPTION}" ${SRFI_FILE}
+	snow-chibi package \
+		--version=${VERSION} \
+		--authors=${AUTHOR} \
+		--doc=${README} \
+		--description="${DESCRIPTION}" \
+		${SRFI_FILE}
 
 install:
-	snow-chibi install --impls=${SCHEME} ${SNOW_CHIBI_ARGS} ${PKG}
+	snow-chibi install --impls=${SCHEME} ${PKG}
 
 uninstall:
 	-snow-chibi remove --impls=${SCHEME} ${PKG}
 
 testfiles:
-	printf "#!r6rs\n(import (rnrs) (srfi :64) (foreign c) (srfi :${SRFI}))" > run-test.sps
-	cat ${TESTFILE} >> run-test.sps
-	echo "(import (scheme base) (scheme write) (scheme read) (scheme char) (scheme file) (scheme process-context) (srfi 64) (foreign c) (srfi ${SRFI}))" > run-test.scm
-	cat ${TESTFILE} >> run-test.scm
+	rm -rf .tmp
+	mkdir -p .tmp
+	cp ${PKG} .tmp
+	cp -r srfi .tmp/
+	cat test-headers.${SFX} ${TESTFILE} | sed 's/SRFI/${SRFI}/' > .tmp/test.${SFX}
+	cat ${TESTFILE} >> run-test.${SFX}
+	if [ "${RNRS}" = "r6rs" ]; then if [ -d ../foreign-c ]; then cp -r ../foreign-c/foreign .tmp/; fi; fi
 
-run-test-venv: testfiles build
-	rm -rf venv
-	scheme-venv ${SCHEME} ${RNRS} venv
-	mkdir -p venv/lib/srfi
-	cp run-test.sps venv/
-	cp run-test.scm venv/
-	if [ "${RNRS}" = "r6rs" ]; then if [ -d ../foreign-c ]; then cp -r ../foreign-c/foreign venv/lib/; fi; fi
-	if [ "${RNRS}" = "r6rs" ]; then cp -r srfi/${SRFI}.* venv/lib/srfi/; fi
-	if [ "${RNRS}" = "r6rs" ]; then ./venv/bin/akku install akku-r7rs; fi
-	if [ "${RNRS}" = "r7rs" ]; then ./venv/bin/snow-chibi install --always-yes srfi.64; fi
-	if [ "${RNRS}" = "r7rs" ]; then ./venv/bin/snow-chibi install ${PKG}; fi
-	if [ "${RNRS}" = "r6rs" ]; then ./venv/bin/scheme-compile venv/run-test.sps; fi
-	if [ "${RNRS}" = "r7rs" ]; then CSC_OPTIONS="-L -lcurl" ./venv/bin/scheme-compile venv/run-test.scm; fi
-	./venv/run-test
+test: testfiles package
+	cd .tmp && COMPILE_R7RS=${SCHEME} compile-r7rs -o test-program test.${SFX}
+	cd .tmp && ./test-program
 
-run-test-system: testfiles build
-	if [ "${RNRS}" = "r6rs" ]; then if [ -d ../foreign-c ]; then cp -r ../foreign-c/foreign .; fi; fi
-	if [ "${RNRS}" = "r6rs" ]; then ./venv/bin/akku install akku-r7rs; fi
-	if [ "${SCHEME}" = "chicken" ]; then snow-chibi install --always-yes srfi.64; fi
-	if [ "${SCHEME}-${RNRS}" = "mosh-r7rs" ]; then snow-chibi install --always-yes srfi.64; fi
-	if [ "${RNRS}" = "r7rs" ]; then snow-chibi install ${PKG}; fi
-	if [ "${RNRS}" = "r6rs" ]; then COMPILE_R7RS=${SCHEME} compile-scheme test.sps; fi
-	if [ "${RNRS}" = "r7rs" ]; then COMPILE_R7RS=${SCHEME} compile-scheme test.scm; fi
-	./test
-
-run-test-docker:
-	docker build --build-arg IMAGE=${DOCKERIMG} -f Dockerfile.test --tag=foreign-c-${SCHEME}-${RNRS} .
-	docker run -v "${PWD}/logs:/workdir/logs" -w /workdir foreign-c-${SCHEME}-${RNRS} sh -c "make SCHEME=${SCHEME} RNRS=${RNRS} TEST=${TEST} run-test-system; mv *.json logs/ || true"
-
-test-r7rs: tmpdir
-	@if [ "${SCHEME}" = "chibi" ]; then rm -rf ${TMPDIR}/srfi/98.*; fi
-	cd ${TMPDIR} && echo "(import (scheme base) (scheme write) (scheme file) (scheme process-context) (foreign c) (srfi ${SRFI}) (srfi 64))" > test-r7rs.scm
-	cd ${TMPDIR} && cat srfi/${SRFI}/test.scm >> test-r7rs.scm
-	cd ${TMPDIR} && COMPILE_R7RS=${SCHEME} compile-scheme -I . -o test-r7rs test-r7rs.scm
-	cd ${TMPDIR} && printf "\n" | timeout 60 ./test-r7rs
-
-test-r7rs-docker:
-	docker build --build-arg IMAGE=${DOCKERIMG} --build-arg SCHEME=${SCHEME} --tag=foreign-c-srfi-test-${SCHEME} -f Dockerfile.test .
-	docker run -t foreign-c-srfi-test-${SCHEME} sh -c "make SCHEME=${SCHEME} SRFI=${SRFI} SNOW_CHIBI_ARGS=--always-yes build install test-r7rs"
-
-test-r6rs: tmpdir
-	cd ${TMPDIR} && echo "(import (rnrs) (foreign c) (srfi :${SRFI}) (srfi :64))" > test-r6rs.sps
-	cd ${TMPDIR} && cat srfi/${SRFI}/test.scm >> test-r6rs.sps
-	cd ${TMPDIR} && akku install chez-srfi akku-r7rs "(foreign c)"
-	cd ${TMPDIR} && COMPILE_R7RS=${SCHEME} compile-scheme -I .akku/lib -o test-r6rs test-r6rs.sps
-	cd ${TMPDIR} && timeout 60 ./test-r6rs
-
-test-r6rs-docker:
-	docker build --build-arg IMAGE=${DOCKERIMG} --build-arg SCHEME=${SCHEME} --tag=foreign-c-srfi-test-${SCHEME} -f Dockerfile.test .
-	docker run -t foreign-c-srfi-test-${SCHEME} sh -c "make SCHEME=${SCHEME} SRFI=${SRFI} test-r6rs"
-
-tmpdir:
-	rm -rf ${TMPDIR}
-	mkdir -p ${TMPDIR}
-	cp -r srfi ${TMPDIR}/
+test-docker: testfiles package
+	cd .tmp && \
+		DOCKER_TAG=${DOCKER_TAG} \
+		SNOW_PACKAGES="srfi.64 srfi.60 srfi.145 srfi.180 retropikzel.mouth foreign.c ${PKG}" \
+		APT_PACKAGES="libcurl4-openssl-dev" \
+		COMPILE_R7RS=${SCHEME} \
+		TEST_R7RS_DEBUG=1 \
+		CSC_OPIONS="-L -lcurl" \
+		test-r7rs -o test-program test.${SFX}
diff --git a/README.md b/README.md
index 20ea4b9..276b247 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-To SRFI library run
+To install SRFI library run
 
     make SCHEME=chibi SRFI=106 build install
 
diff --git a/srfi/170.sld b/srfi/170.sld
index 98b85c9..dd541a0 100644
--- a/srfi/170.sld
+++ b/srfi/170.sld
@@ -48,7 +48,7 @@
           open-directory
           read-directory
           close-directory
-          real-path
+          ;real-path
           ;file-space
           temp-file-prefix
           create-temp-file
diff --git a/srfi/170/VERSION b/srfi/170/VERSION
index d917d3e..845639e 100644
--- a/srfi/170/VERSION
+++ b/srfi/170/VERSION
@@ -1 +1 @@
-0.1.2
+0.1.4
diff --git a/srfi/170/test.scm b/srfi/170/test.scm
index fbb39be..5228fe7 100644
--- a/srfi/170/test.scm
+++ b/srfi/170/test.scm
@@ -1,9 +1,9 @@
 (test-begin "srfi-170")
 
-(display (real-path "Makefile"))
-(newline)
+;(display (real-path "Makefile"))
+;(newline)
 
-(exit 0)
+;(exit 0)
 
 (define tmp-dir "/tmp/foreign-c-srfi-170")
 (when (file-exists? tmp-dir) (delete-directory tmp-dir))
diff --git a/test-headers.scm b/test-headers.scm
new file mode 100644
index 0000000..72fea0c
--- /dev/null
+++ b/test-headers.scm
@@ -0,0 +1,9 @@
+(import (scheme base)
+        (scheme write)
+        (scheme read)
+        (scheme char)
+        (scheme file)
+        (scheme process-context)
+        (srfi 64)
+        (foreign c)
+        (srfi SRFI))
diff --git a/test-headers.sps b/test-headers.sps
new file mode 100644
index 0000000..788aba2
--- /dev/null
+++ b/test-headers.sps
@@ -0,0 +1,4 @@
+(import (rnrs)
+        (srfi :64)
+        (foreign c)
+        (srfi SRFI))