diff --git a/example/kiwi.yml b/example/kiwi.yml
index 9c04e91..402216c 100644
--- a/example/kiwi.yml
+++ b/example/kiwi.yml
@@ -2,7 +2,7 @@
 # kiwi-config instance configuration #
 ######################################
 
-version: '0.0.3'
+version: '0.0.4'
 
 runtime:
   storage: /tmp/kiwi
diff --git a/install.sh b/install.sh
index 176dcf5..52fdf5e 100755
--- a/install.sh
+++ b/install.sh
@@ -6,6 +6,8 @@
 
 # dependencies to run kiwi-config
 KIWI_DEPS="bash python3 pipenv less"
+# default install directory
+INSTALL_DIR_DEFAULT="/usr/local/bin"
 
 ##########
 # CHECKS #
@@ -30,13 +32,12 @@ echo "OK"
 ########
 
 # prompt for installation directory
-install_dir_default="/usr/local/bin"
 valid="no"
 
 while [ "${valid}" = "no" ]; do
-  printf "Select installation directory [Default: '%s']: " "${install_dir_default}"
-  read install_dir </dev/tty || install_dir="${install_dir_default}"
-  install_dir="${install_dir:-${install_dir_default}}"
+  printf "Select installation directory [Default: '%s']: " "${INSTALL_DIR_DEFAULT}"
+  read install_dir </dev/tty || install_dir="${INSTALL_DIR_DEFAULT}"
+  install_dir="${install_dir:-${INSTALL_DIR_DEFAULT}}"
 
   # check
   if [ -d "${install_dir}" ]; then
@@ -66,7 +67,7 @@ printf "Installing into '%s' ... " "${install_dir}"
 uri="https://raw.githubusercontent.com/ldericher/kiwi-config/master/kiwi"
 tmp_file="$(mktemp)"
 
-if ! curl --proto '=https' --tlsv1.2 --silent --fail --output "${tmp_file}" "${uri}" >/dev/null 2>/dev/null; then
+if ! curl --proto '=https' --tlsv1.2 -sSf -o "${tmp_file}" "${uri}" >/dev/null 2>/dev/null; then
   rm "${tmp_file}"
   echo "Download 'kiwi' failed!" >/dev/stderr
   exit 1
diff --git a/kiwi b/kiwi
index 743921f..4b06067 100755
--- a/kiwi
+++ b/kiwi
@@ -84,8 +84,7 @@ if [ ! -x "$(kiwi_executable)" ]; then
   cd "${tmpdir}" || :
 
   # download archive
-  curl --proto '=https' --tlsv1.2 --silent --fail --location --output "kiwi-config.zip" "${KIWI_REPO}/archive/${KIWI_VERSION}.zip"
-  unzip -qq "kiwi-config.zip"
+  curl --proto '=https' --tlsv1.2 -sSfL -o "kiwi-config.zip" "${KIWI_REPO}/archive/${KIWI_VERSION}.zip" | tar xz
 
   # read archive version tag
   cd "kiwi-config-${KIWI_VERSION}" || :
@@ -121,10 +120,13 @@ cd "${WORKDIR}" || :
 
 # setup main environment
 KIWI_ROOT="$(kiwi_root)"
+PIPENV_VERBOSITY=-1
+PIPENV_PIPFILE="$(kiwi_installdir)/Pipfile"
 
 export KIWI_ROOT
 export KIWI_CONF_NAME
-export PIPENV_VERBOSITY=-1
+export PIPENV_VERBOSITY
+export PIPENV_PIPFILE
 
 # run main script
 exec pipenv run "$(kiwi_executable)" "${@}"
diff --git a/src/etc/version_tag b/src/etc/version_tag
index 6812f81..05b19b1 100644
--- a/src/etc/version_tag
+++ b/src/etc/version_tag
@@ -1 +1 @@
-0.0.3
\ No newline at end of file
+0.0.4
\ No newline at end of file