diff --git a/cd.sh b/cd.sh
index e4796f3..c362a84 100644
--- a/cd.sh
+++ b/cd.sh
@@ -1,41 +1,20 @@
-CD_DNS_SERVERS=(
+NAMESERVERS=(
 '9.9.9.9'
 )
-CD_REPOSITORY='rwx.work/cd'
+REPOSITORY='rwx.work/cd'
 
-CD_DNS_FILE='/etc/resolv.conf'
-case "${CD_OS_NAME}" in
-    'debian')
-        case "${CD_OS_VERSION}" in
-            'bookworm')
-                echo 'bookworm!'
-            ;;
-            *)
-                echo 'CD_OS_VERSION'
-                exit 2
-            ;;
-        esac
-    ;;
-    *)
-        echo 'CD_OS_NAME'
-        exit 1
-    ;;
-esac
-
-function split {
-    [ "${1}" ] && echo "
-${1}
+echo "
+ 1/14 set name servers
 "
-}
-
-split " 1/14 set name servers"
-for server in "${CD_DNS_SERVERS[@]}" ; do
-    echo "nameserver ${server}" \
-    >> "${CD_DNS_FILE}" \
+for nameserver in "${NAMESERVERS[@]}" ; do
+    echo "nameserver ${nameserver}" \
+    >> '/etc/resolv.conf' \
     || exit
 done
 
-split " 2/14 configure package manager"
+echo "
+ 2/14 configure package manager
+"
 echo -n "\
 Acquire::Check-Valid-Until True;
 APT::Get::Show-Versions True;
@@ -44,7 +23,9 @@ APT::Install-Suggests False;
 Dir::Etc::SourceParts '';
 " > '/etc/apt/apt.conf.d/apt.conf' \
 || exit
-split " 3/14 configure package repositories"
+echo "
+ 3/14 configure package repositories
+"
 echo -n "\
 deb https://deb.debian.org/debian bookworm main
 deb https://deb.debian.org/debian bookworm-backports main
@@ -53,45 +34,67 @@ deb https://deb.debian.org/debian-security bookworm-security main
 " > '/etc/apt/sources.list' \
 || exit
 
-split " 4/14 disable package verification"
+echo "
+ 4/14 disable package verification
+"
 echo -n "\
 Acquire::https::Verify-Peer False;
 " > '/etc/apt/apt.conf.d/https' \
 || exit
-split " 5/14 update package catalog"
+echo "
+ 5/14 update package catalog
+"
 apt-get update \
 || exit
-split " 6/14 install CA certificates package"
+echo "
+ 6/14 install CA certificates package
+"
 apt-get install --yes 'ca-certificates' \
 || exit
-split " 7/14 enable package verification"
+echo "
+ 7/14 enable package verification
+"
 rm '/etc/apt/apt.conf.d/https' \
 || exit
 
-split " 8/14 update package catalog"
+echo "
+ 8/14 update package catalog
+"
 apt-get update \
 || exit
-split " 9/14 upgrade packages"
+echo "
+ 9/14 upgrade packages
+"
 apt-get upgrade --yes \
 || exit
 
-split "10/14 install Git"
+echo "
+10/14 install Git
+"
 apt-get install --yes 'git' \
 || exit
 
 DIRECTORY="$(mktemp --directory)" \
 || exit
-split "11/14 clone Continuous Delivery"
+echo "
+11/14 clone Continuous Delivery
+"
 git clone \
-"${GITHUB_SERVER_URL}/${CD_REPOSITORY}" \
+"${GITHUB_SERVER_URL}/${REPOSITORY}" \
 "${DIRECTORY}" \
 || exit
 
-split "12/14 install Python"
+echo "
+12/14 install Python
+"
 apt-get install --yes 'python3' \
 || exit
-split "13/14 clean package cache"
+echo "
+13/14 clean package cache
+"
 apt-get clean \
 || exit
-split "14/14 bootstrap"
+echo "
+14/14 bootstrap
+"
 "${DIRECTORY}/bootstrap.sh"