diff --git a/cmake/debian/preinst b/cmake/debian/preinst
index e0107138..5559dca8 100644
--- a/cmake/debian/preinst
+++ b/cmake/debian/preinst
@@ -3,7 +3,7 @@
 echo "---Hyperion ambient light preinst ---"
 
 # search for users in system, returns first entry
-FOUND_USR=`who | grep -o '^\w*\b'` || "root"
+FOUND_USR=`who | grep -o -m1 '^\w*\b'` || "root"
 
 # stop running daemon before we install
 if pgrep hyperiond > /dev/null 2>&1
diff --git a/cmake/debian/prerm b/cmake/debian/prerm
index 388c79ae..ceb8c5a4 100644
--- a/cmake/debian/prerm
+++ b/cmake/debian/prerm
@@ -3,7 +3,7 @@
 echo "---Hyperion ambient light prerm ---"
 
 # search for users in system, returns first entry
-FOUND_USR=`who | grep -o '^\w*\b'` || "root"
+FOUND_USR=`who | grep -o -m1 '^\w*\b'` || "root"
 
 # stop running daemon before we delete it
 HYPERION_RUNNING=false
diff --git a/cmake/rpm/postinst b/cmake/rpm/postinst
index eb9fa7ec..9c090cf1 100644
--- a/cmake/rpm/postinst
+++ b/cmake/rpm/postinst
@@ -29,7 +29,7 @@ BOOT_BERRYBOOT=$(grep -m1 -c '\(/var/media\|/media/pi\)/berryboot' /etc/mtab)
 NET_IP=`hostname -I | cut -d " " -f1`
 
 # search for users in system, returns first entry
-FOUND_USR=`who | grep -o '^\w*\b'` || "root"
+FOUND_USR=`who | grep -o -m1 '^\w*\b'` || "root"
 
 # determine if we should use a service
 ENABLE_SERVICE=0
diff --git a/cmake/rpm/preinst b/cmake/rpm/preinst
index 3dbfdd2f..e891e82e 100644
--- a/cmake/rpm/preinst
+++ b/cmake/rpm/preinst
@@ -3,7 +3,7 @@
 echo "---Hyperion ambient light preinst ---"
 
 # search for users in system, returns first entry
-FOUND_USR=`who | grep -o '^\w*\b'` || "root"
+FOUND_USR=`who | grep -o -m1 '^\w*\b'` || "root"
 
 # stop running daemon before we install
 if pgrep hyperiond > /dev/null 2>&1
diff --git a/cmake/rpm/prerm b/cmake/rpm/prerm
index 388c79ae..ceb8c5a4 100644
--- a/cmake/rpm/prerm
+++ b/cmake/rpm/prerm
@@ -3,7 +3,7 @@
 echo "---Hyperion ambient light prerm ---"
 
 # search for users in system, returns first entry
-FOUND_USR=`who | grep -o '^\w*\b'` || "root"
+FOUND_USR=`who | grep -o -m1 '^\w*\b'` || "root"
 
 # stop running daemon before we delete it
 HYPERION_RUNNING=false