diff --git a/tools/arkmanager b/tools/arkmanager
index c668302..aca1188 100755
--- a/tools/arkmanager
+++ b/tools/arkmanager
@@ -25,6 +25,11 @@ if [ -f "${HOME}/.arkmanager.cfg" ]; then
     source "${HOME}/.arkmanager.cfg"
 fi
 
+lsof=lsof
+if [ -x /usr/sbin/lsof ]; then
+  lsof=/usr/sbin/lsof
+fi
+
 # Local variables
 info=""
 thejob=""
@@ -185,7 +190,7 @@ function isTheServerRunning(){
 #
 #
 function isTheServerUp(){
-  lsof -i :"$ark_Port" > /dev/null
+  $lsof -i :"$ark_Port" > /dev/null
   result=$?
   # In this case, the result is:
   # 1 if the command fail. The port is not listenning
diff --git a/tools/arkmanager.cfg b/tools/arkmanager.cfg
index 07325ea..23f96d7 100644
--- a/tools/arkmanager.cfg
+++ b/tools/arkmanager.cfg
@@ -28,6 +28,3 @@ logdir="/var/log/arktools"                                          # Logs path
 
 # steamdb specific
 appid=376030                                                        # Linux server App ID
-
-# admin information
-servermail=""                                                       # Log email, leave blank if you dont want to receive mail
diff --git a/tools/install.sh b/tools/install.sh
index 55d249c..fee74a2 100755
--- a/tools/install.sh
+++ b/tools/install.sh
@@ -16,6 +16,7 @@ if [ ! -z "$1" ]; then
         chmod +x "${INSTALL_ROOT}${EXECPREFIX}/libexec/arkmanager/arkmanager.init"
         cp systemd/arkdeamon.service "${INSTALL_ROOT}/etc/systemd/system/arkmanager.service"
         sed -i "s|=/usr/|=${EXECPREFIX}/|" "${INSTALL_ROOT}/etc/systemd/system/arkmanager.service"
+        sed -i "s@^DAEMON=\"/usr@DAEMON=\"${EXECPREFIX}@" "${INSTALL_ROOT}${EXECPREFIX}/libexec/arkmanager/arkmanager.init"
         if [ -z "${INSTALL_ROOT}" ]; then
           systemctl daemon-reload
           systemctl enable arkmanager.service
@@ -41,6 +42,7 @@ if [ ! -z "$1" ]; then
         chmod +x "${INSTALL_ROOT}${EXECPREFIX}/libexec/arkmanager/arkmanager.init"
         cp systemd/arkdeamon.service "${INSTALL_ROOT}/etc/systemd/system/arkmanager.service"
         sed -i "s|=/usr/|=${EXECPREFIX}/|" "${INSTALL_ROOT}/etc/systemd/system/arkmanager.service"
+        sed -i "s@^DAEMON=\"/usr@DAEMON=\"${EXECPREFIX}@" "${INSTALL_ROOT}${EXECPREFIX}/libexec/arkmanager/arkmanager.init"
         if [ -z "${INSTALL_ROOT}" ]; then
           systemctl daemon-reload
           systemctl enable arkmanager.service
@@ -72,6 +74,7 @@ if [ ! -z "$1" ]; then
       chmod +x "${INSTALL_ROOT}${EXECPREFIX}/libexec/arkmanager/arkmanager.init"
       cp systemd/arkdeamon.service "${INSTALL_ROOT}/etc/systemd/system/arkmanager.service"
       sed -i "s|=/usr/|=${EXECPREFIX}/|" "${INSTALL_ROOT}/etc/systemd/system/arkmanager.service"
+      sed -i "s@^DAEMON=\"/usr@DAEMON=\"${EXECPREFIX}@" "${INSTALL_ROOT}${EXECPREFIX}/libexec/arkmanager/arkmanager.init"
       if [ -z "${INSTALL_ROOT}" ]; then
         systemctl enable arkmanager.service
         echo "Ark server will now start on boot, if you want to remove this feature run the following line"
@@ -100,6 +103,12 @@ if [ ! -z "$1" ]; then
 else
     echo "You must specify your system steam user who own steamcmd directory to install ARK Tools."
     echo "Usage: ./install.sh steam"
+    echo
+    echo "Environment variables affecting install:"
+    echo "EXECPREFIX:   prefix in which to install arkmanager executable"
+    echo "              [${EXECPREFIX}]"
+    echo "INSTALL_ROOT: staging directory in which to perform install"
+    echo "              [${INSTALL_ROOT}]"
     exit 1
 fi