diff --git a/.gitignore b/.gitignore
index cfd13a5..83af198 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,5 @@ venv
 compile-test
 *.link
 test
+*.deb
+deb
diff --git a/Makefile b/Makefile
index 030d1ce..7914f24 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+VERSION=1.0.0
+DEB=scheme-venv-${VERSION}.deb
 PREFIX=/usr/local
 SCHEME=chibi
 RNRS=r7rs
@@ -32,6 +34,16 @@ test-script-docker: build-docker-image
 test-compile-docker: build-docker-image
 	docker run -v ${PWD}:${PWD} -w ${PWD} ${DOCKERTAG} sh -c "make SCHEME=${SCHEME} RNRS=${RNRS} test-compile"
 
+deb:
+	mkdir -p deb/usr/local/bin
+	cp scheme-venv deb/usr/local/bin/
+	mkdir -p deb/DEBIAN
+	printf "Package: scheme-venv\nArchitecture: amd64\nVersion: ${VERSION}\nSection: misc\nMaintainer: Retropikzel <retropikzel@iki.fi>\nDescription: Tool to create Scheme virtual environments\n" \
+		> deb/DEBIAN/control
+	dpkg-deb -b deb
+	cp deb.deb scheme-venv-latest.deb
+	mv deb.deb scheme-venv-${VERSION}.deb
+
 install:
 	@mkdir -p ${PREFIX}/bin
 	@install scheme-venv ${PREFIX}/bin/scheme-venv
diff --git a/README.md b/README.md
index 4eea95d..3a143dc 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,47 @@
 Tool to create Scheme virtual environments
 
+## Installation
 
-## scheme-compile
+    make
+    make install
 
 
-## Chicken
+## Usage
+
+    scheme-venv chibi r7rs venv
+
+
+First argument is Scheme, second is RnRS and third is path to directory. The
+directory must not exist.
+
+After the virtual environment is created you can activate is with:
+
+    source venv/bin/activate
+
+
+After activation you can install packages with either snow-chibi or akku and
+they will be installed inside the virtual environment. To run your Scheme code
+use either scheme-script or scheme-compile, executables.
+
+
+R6RS:
+
+    akku install chez-srfi
+    scheme-script main.sps
+    scheme-compile main.sps
+    ./main
+
+R7RS:
+
+    snow-chibi install srfi.64
+    scheme-script main.scm
+    scheme-compile main.scm
+    ./main
+
+
+## Implementation specific notes
+
+### Chicken
 
 - Before compilation the directory is changed to be venv/lib so libraries will be found
 - venv/include
diff --git a/scheme-venv b/scheme-venv
index bfff850..3487745 100755
--- a/scheme-venv
+++ b/scheme-venv
@@ -47,10 +47,12 @@ if [ "${3}" = "" ]; then
 fi
 
 if [ -d "${3}" ]; then
-    if [ -f "${3}/bin/scheme-venv-info" ]; then
-        echo "Directory is already venv, reiniting..."
-    else
-        echo "Path already exists, and is not scheme-venv (no /bin/scheme-venv-info)"
+    if [ -f "${3}" ]; then
+        echo "Path exists"
+        exit 1
+    fi
+    if [ -d "${3}" ]; then
+        echo "Path exists"
         exit 1
     fi
 fi
@@ -166,8 +168,8 @@ if [ "${rnrs}" = "r6rs" ]; then
             scheme_repl_cmd="mosh --loadpath=\"${venvpath}/lib/.akku/lib\""
             ;;
           "racket")
-            scheme_cmd="racket -I scheme/init -l r6rs/run.rkt -S \"${venvpath}/lib/.akku/lib\" \"\${IF}\""
-            scheme_repl_cmd="racket -I scheme/init -l r6rs/run.rkt -S \"${venvpath}/lib/.akku/lib\""
+            scheme_cmd="PLTCOLLECTS=\"${venvpath}/lib/.akku/lib\" racket -I scheme/init -l r6rs/run.rkt -S \"${venvpath}/lib/.akku/lib\" \"\${IF}\""
+            scheme_repl_cmd="PLTCOLLECTS=\"${venvpath}/lib/.akku/lib\" racket -I scheme/init -l r6rs/run.rkt -S \"${venvpath}/lib/.akku/lib\""
             ;;
           "sagittarius")
             scheme_cmd="sash -r6 -L \"${venvpath}/lib/.akku/lib\" \"\${IF}\""
@@ -217,10 +219,9 @@ else
             scheme_repl_cmd="foment -I \"${venvpath}/lib\""
             ;;
           "gambit")
-            scheme_cmd="gsi \"${venvpath}/lib/\" \"\${IF}\""
-            scheme_repl_cmd="gsi \"${venvpath}/lib/\""
-            #scheme_compile_cmd="gsc -o \"\${OF}\" -exe -nopreload \"${venvpath}/lib/\" \"\${IF}\""
-            scheme_compile_cmd="echo \"Gambit compiler not supported\" && exit 1"
+            scheme_cmd="gsi -:r7rs \"${venvpath}/lib/\" \"\${IF}\""
+            scheme_repl_cmd="gsi -:r7rs \"${venvpath}/lib/\""
+            scheme_compile_cmd="gsc -:r7rs -o \"\${OF}\" -exe -nopreload \"${venvpath}/lib/\" \"\${IF}\""
             ;;
           "gauche")
             scheme_cmd="gosh -r7 -I \"${venvpath}/lib\" \"\${IF}\""
@@ -232,8 +233,9 @@ else
             scheme_compile_cmd="echo \"Guile compiler not supported\" && exit 1"
             ;;
           "kawa")
-            scheme_cmd="kawa -J--add-exports=java.base/jdk.internal.foreign.abi=ALL-UNNAMED -J--add-exports=java.base/jdk.internal.foreign.layout=ALL-UNNAMED -J--add-exports=java.base/jdk.internal.foreign=ALL-UNNAMED -J--enable-native-access=ALL-UNNAMED -J--enable-preview --r7rs --full-tailcalls -Dkawa.import.path=\"${venvpath}/lib/*.sld\" \"\${IF}\""
-            scheme_repl_cmd="kawa -J--add-exports=java.base/jdk.internal.foreign.abi=ALL-UNNAMED -J--add-exports=java.base/jdk.internal.foreign.layout=ALL-UNNAMED -J--add-exports=java.base/jdk.internal.foreign=ALL-UNNAMED -J--enable-native-access=ALL-UNNAMED -J--enable-preview --r7rs --full-tailcalls -Dkawa.import.path=\"${venvpath}/lib/*.sld\""
+            kawa_library_path=$(kawa -e "(display (get-environment-variable \"CLASSPATH\"))" | awk -F'kawa.jar' '{print $1}')
+            scheme_cmd="kawa -J--add-exports=java.base/jdk.internal.foreign.abi=ALL-UNNAMED -J--add-exports=java.base/jdk.internal.foreign.layout=ALL-UNNAMED -J--add-exports=java.base/jdk.internal.foreign=ALL-UNNAMED -J--enable-native-access=ALL-UNNAMED -Dkawa.import.path=\"${venvpath}/lib/*.sld:${kawa_library_path}/*.sld\" --r7rs --full-tailcalls -f \"\${IF}\""
+            scheme_repl_cmd="kawa -J--add-exports=java.base/jdk.internal.foreign.abi=ALL-UNNAMED -J--add-exports=java.base/jdk.internal.foreign.layout=ALL-UNNAMED -J--add-exports=java.base/jdk.internal.foreign=ALL-UNNAMED -J--enable-native-access=ALL-UNNAMED -Dkawa.import.path=\"${venvpath}/lib/*.sld:${kawa_library_path}/*.sld\" --r7rs --full-tailcalls"
             ;;
           "larceny")
             scheme_cmd="larceny -nobanner -quiet -utf8 -r7 -I \"${venvpath}/lib\" \"\${IF}\""
@@ -258,8 +260,8 @@ else
             scheme_repl_cmd="mosh --loadpath=\"${venvpath}/lib\""
             ;;
           "racket")
-            scheme_cmd="racket -I r7rs -S \"${venvpath}/lib\" --script \"\${IF}\""
-            scheme_repl_cmd="racket -I r7rs -S \"${venvpath}/lib\""
+            scheme_cmd="PLTCOLLECTS=\"${venvpath}/lib\" racket -I r7rs -S \"${venvpath}/lib\" --script \"\${IF}\""
+            scheme_repl_cmd="PLTCOLLECTS=\"${venvpath}/lib\" racket -I r7rs -S \"${venvpath}/lib\""
             ;;
           "sagittarius")
             scheme_cmd="sash -r7 -L \"${venvpath}/lib\" \"\${IF}\""
@@ -333,11 +335,6 @@ else
     chmod +x "${venvpath}/bin/scheme-compile"
 fi
 
-impls="${implementation}"
-if [ "${RNRS}" = "" ]; then
-    impls=generic
-fi
-
 ## bin/snow-chibi
 {
 cat << EOF
@@ -347,7 +344,7 @@ if [ "\${1}" = "install" ]; then
     shift
     snow-chibi \
     install \
-        --impls=${impls} \
+        --impls=${implementation} \
         --install-source-dir=${venvpath}/lib \
         --install-library-dir=${venvpath}/lib \
         --install-data-dir=${venvpath}/lib \
@@ -365,7 +362,7 @@ chmod +x "${venvpath}/bin/snow-chibi"
 cat << EOF
 #!/bin/sh
 if [ ! "\${VENV_DEBUG}" = "" ]; then set -x; fi
-cd "${venvpath}/lib"
+cd "${venvpath}/lib" || exit 1
 akku \$@
 EOF
 } > "${venvpath}/bin/akku"