diff --git a/00-install.sh b/00-install.sh
index fa296b2..ce95833 100755
--- a/00-install.sh
+++ b/00-install.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # For production builds change to DEBUG=0 or comment the line entirely
 export DEBUG=1
@@ -6,7 +6,7 @@ export DEBUG=1
 SOURCE_DIR=$(realpath $(dirname "${0}"))
 
 # Install shared packages and perform OS customization
-${SOURCE_DIR}/01-basic.sh
+${SOURCE_DIR}/basic.sh
 
 # Install applications
 ${SOURCE_DIR}/ckan.sh
diff --git a/alpine.sh b/alpine.sh
old mode 100644
new mode 100755
diff --git a/01-basic.sh b/basic.sh
similarity index 90%
rename from 01-basic.sh
rename to basic.sh
index 39b40c1..41afe10 100755
--- a/01-basic.sh
+++ b/basic.sh
@@ -3,7 +3,8 @@
 SOURCE_DIR=$(realpath $(dirname "${0}"))/basic
 
 # Install packages
-apk --no-cache add docker gettext git htop kbd-misc libressl openssh-server openssh-sftp-server postfix nginx
+apk --no-cache add --virtual .useful git file htop libressl openssh-server openssh-sftp-server
+apk --no-cache add docker gettext kbd-misc postfix nginx
 
 # Copy profile files and settings
 mkdir /root/.ssh
diff --git a/postgres.sh b/postgres.sh
old mode 100644
new mode 100755
index 31f6bfe..a90e444
--- a/postgres.sh
+++ b/postgres.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 SOURCE_DIR=$(realpath $(dirname "${0}"))/postgres
 
diff --git a/postgres/etc/init.d/postgres b/postgres/etc/init.d/postgres
old mode 100644
new mode 100755
diff --git a/redis.sh b/redis.sh
index 8cc92a4..82d4ac7 100755
--- a/redis.sh
+++ b/redis.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 SOURCE_DIR=$(realpath $(dirname "${0}"))/redis
 # Build Docker container
diff --git a/redis/etc/init.d/redis b/redis/etc/init.d/redis
old mode 100644
new mode 100755
diff --git a/solr.sh b/solr.sh
index e2716b2..b78fd9c 100755
--- a/solr.sh
+++ b/solr.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 SOURCE_DIR=$(realpath $(dirname "${0}"))/solr
 
diff --git a/solr/etc/init.d/solr b/solr/etc/init.d/solr
old mode 100644
new mode 100755
diff --git a/zz-cleanup.sh b/zz-cleanup.sh
index 30ca956..25b2113 100755
--- a/zz-cleanup.sh
+++ b/zz-cleanup.sh
@@ -1,12 +1,10 @@
-#!/bin/bash
+#!/bin/sh
 
 # Remove packages not necessary for release
-apt-get -y purge bash-completion file gcc git htop openssh-server tree uuid-runtime vim
-dpkg -l | awk '{print $2}' | grep '\-dev$' | apt-get -y purge
-apt-get -y --purge autoremove
+apk del .useful
 
 # Clean package cache
-apt-get -y clean
+rm -rf /var/cache/apk/*
 
 # Remove user settings
 rm -rf /root/* /root/.*