diff --git a/files/applets/bin/powermenu.sh b/files/applets/bin/powermenu.sh
index 8ed9106..b369213 100755
--- a/files/applets/bin/powermenu.sh
+++ b/files/applets/bin/powermenu.sh
@@ -1,4 +1,6 @@
-#!/usr/bin/env bash
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p rofi gnugrep
+# shellcheck shell=bash
 
 ## Author  : Aditya Shakya (adi1090x)
 ## Github  : @adi1090x
@@ -6,124 +8,130 @@
 ## Applets : Power Menu
 
 # Import Current Theme
+# shellcheck source=./../shared/theme.bash
 source "$HOME"/.config/rofi/applets/shared/theme.bash
 theme="$type/$style"
 
 # Theme Elements
-prompt="`hostname`"
-mesg="Uptime : `uptime -p | sed -e 's/up //g'`"
+prompt="$(hostname)"
+mesg="Uptime : $(uptime -p | sed -e 's/up //g')"
 
-if [[ ( "$theme" == *'type-1'* ) || ( "$theme" == *'type-3'* ) || ( "$theme" == *'type-5'* ) ]]; then
-	list_col='1'
-	list_row='6'
-elif [[ ( "$theme" == *'type-2'* ) || ( "$theme" == *'type-4'* ) ]]; then
-	list_col='6'
-	list_row='1'
+if [[ ("$theme" == *'type-1'*) || ("$theme" == *'type-3'*) || ("$theme" == *'type-5'*) ]]; then
+  list_col='1'
+  list_row='6'
+elif [[ ("$theme" == *'type-2'*) || ("$theme" == *'type-4'*) ]]; then
+  list_col='6'
+  list_row='1'
 fi
 
 # Options
-layout=`cat ${theme} | grep 'USE_ICON' | cut -d'=' -f2`
+layout=$(cat "${theme}" | grep 'USE_ICON' | cut -d'=' -f2)
 if [[ "$layout" == 'NO' ]]; then
-	option_1=" Lock"
-	option_2=" Logout"
-	option_3=" Suspend"
-	option_4=" Hibernate"
-	option_5=" Reboot"
-	option_6=" Shutdown"
-	yes=' Yes'
-	no=' No'
+  option_1=" Lock"
+  option_2=" Logout"
+  option_3=" Suspend"
+  option_4=" Hibernate"
+  option_5=" Reboot"
+  option_6=" Shutdown"
+  yes=' Yes'
+  no=' No'
 else
-	option_1=""
-	option_2=""
-	option_3=""
-	option_4=""
-	option_5=""
-	option_6=""
-	yes=''
-	no=''
+  option_1=""
+  option_2=""
+  option_3=""
+  option_4=""
+  option_5=""
+  option_6=""
+  yes=''
+  no=''
 fi
 
 # Rofi CMD
-rofi_cmd() {
-	rofi -theme-str "listview {columns: $list_col; lines: $list_row;}" \
-		-theme-str 'textbox-prompt-colon {str: "";}' \
-		-dmenu \
-		-p "$prompt" \
-		-mesg "$mesg" \
-		-markup-rows \
-		-theme ${theme}
+rofi_cmd()
+{
+  rofi -theme-str "listview {columns: $list_col; lines: $list_row;}" \
+    -theme-str 'textbox-prompt-colon {str: "";}' \
+    -dmenu \
+    -p "$prompt" \
+    -mesg "$mesg" \
+    -markup-rows \
+    -theme "${theme}"
 }
 
 # Pass variables to rofi dmenu
-run_rofi() {
-	echo -e "$option_1\n$option_2\n$option_3\n$option_4\n$option_5\n$option_6" | rofi_cmd
+run_rofi()
+{
+  echo -e "$option_1\n$option_2\n$option_3\n$option_4\n$option_5\n$option_6" | rofi_cmd
 }
 
 # Confirmation CMD
-confirm_cmd() {
-	rofi -theme-str 'window {location: center; anchor: center; fullscreen: false; width: 350px;}' \
-		-theme-str 'mainbox {orientation: vertical; children: [ "message", "listview" ];}' \
-		-theme-str 'listview {columns: 2; lines: 1;}' \
-		-theme-str 'element-text {horizontal-align: 0.5;}' \
-		-theme-str 'textbox {horizontal-align: 0.5;}' \
-		-dmenu \
-		-p 'Confirmation' \
-		-mesg 'Are you Sure?' \
-		-theme ${theme}
+confirm_cmd()
+{
+  rofi -theme-str 'window {location: center; anchor: center; fullscreen: false; width: 350px;}' \
+    -theme-str 'mainbox {orientation: vertical; children: [ "message", "listview" ];}' \
+    -theme-str 'listview {columns: 2; lines: 1;}' \
+    -theme-str 'element-text {horizontal-align: 0.5;}' \
+    -theme-str 'textbox {horizontal-align: 0.5;}' \
+    -dmenu \
+    -p 'Confirmation' \
+    -mesg 'Are you Sure?' \
+    -theme "${theme}"
 }
 
 # Ask for confirmation
-confirm_exit() {
-	echo -e "$yes\n$no" | confirm_cmd
+confirm_exit()
+{
+  echo -e "$yes\n$no" | confirm_cmd
 }
 
 # Confirm and execute
-confirm_run () {	
-	selected="$(confirm_exit)"
-	if [[ "$selected" == "$yes" ]]; then
-        ${1} && ${2} && ${3}
-    else
-        exit
-    fi	
+confirm_run()
+{
+  selected="$(confirm_exit)"
+  if [[ "$selected" == "$yes" ]]; then
+    ${1} && ${2} && ${3}
+  else
+    exit
+  fi
 }
 
 # Execute Command
-run_cmd() {
-	if [[ "$1" == '--opt1' ]]; then
-		betterlockscreen -l
-	elif [[ "$1" == '--opt2' ]]; then
-		confirm_run 'kill -9 -1'
-	elif [[ "$1" == '--opt3' ]]; then
-		confirm_run 'mpc -q pause' 'amixer set Master mute' 'systemctl suspend'
-	elif [[ "$1" == '--opt4' ]]; then
-		confirm_run 'systemctl hibernate'
-	elif [[ "$1" == '--opt5' ]]; then
-		confirm_run 'systemctl reboot'
-	elif [[ "$1" == '--opt6' ]]; then
-		confirm_run 'systemctl poweroff'
-	fi
+run_cmd()
+{
+  if [[ "$1" == '--opt1' ]]; then
+    betterlockscreen -l
+  elif [[ "$1" == '--opt2' ]]; then
+    confirm_run 'kill -9 -1'
+  elif [[ "$1" == '--opt3' ]]; then
+    confirm_run 'mpc -q pause' 'amixer set Master mute' 'systemctl suspend'
+  elif [[ "$1" == '--opt4' ]]; then
+    confirm_run 'systemctl hibernate'
+  elif [[ "$1" == '--opt5' ]]; then
+    confirm_run 'systemctl reboot'
+  elif [[ "$1" == '--opt6' ]]; then
+    confirm_run 'systemctl poweroff'
+  fi
 }
 
 # Actions
 chosen="$(run_rofi)"
 case ${chosen} in
-    $option_1)
-		run_cmd --opt1
-        ;;
-    $option_2)
-		run_cmd --opt2
-        ;;
-    $option_3)
-		run_cmd --opt3
-        ;;
-    $option_4)
-		run_cmd --opt4
-        ;;
-    $option_5)
-		run_cmd --opt5
-        ;;
-    $option_6)
-		run_cmd --opt6
-        ;;
+  "$option_1")
+    run_cmd --opt1
+    ;;
+  "$option_2")
+    run_cmd --opt2
+    ;;
+  "$option_3")
+    run_cmd --opt3
+    ;;
+  "$option_4")
+    run_cmd --opt4
+    ;;
+  "$option_5")
+    run_cmd --opt5
+    ;;
+  "$option_6")
+    run_cmd --opt6
+    ;;
 esac
-
diff --git a/files/launchers/type-1/launcher.sh b/files/launchers/type-1/launcher.sh
index 6a0cb69..2ea2203 100755
--- a/files/launchers/type-1/launcher.sh
+++ b/files/launchers/type-1/launcher.sh
@@ -1,4 +1,6 @@
-#!/usr/bin/env bash
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p rofi
+# shellcheck shell=bash
 
 ## Author : Aditya Shakya (adi1090x)
 ## Github : @adi1090x
diff --git a/files/launchers/type-2/launcher.sh b/files/launchers/type-2/launcher.sh
index 3422cd7..0b79eae 100755
--- a/files/launchers/type-2/launcher.sh
+++ b/files/launchers/type-2/launcher.sh
@@ -1,4 +1,6 @@
-#!/usr/bin/env bash
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p rofi
+# shellcheck shell=bash
 
 ## Author : Aditya Shakya (adi1090x)
 ## Github : @adi1090x
@@ -16,5 +18,5 @@ theme='style-1'
 
 ## Run
 rofi \
-    -show drun \
-    -theme ${dir}/${theme}.rasi
+  -show drun \
+  -theme "${dir}"/${theme}.rasi
diff --git a/files/launchers/type-3/launcher.sh b/files/launchers/type-3/launcher.sh
index ae97b5f..b903574 100755
--- a/files/launchers/type-3/launcher.sh
+++ b/files/launchers/type-3/launcher.sh
@@ -1,4 +1,6 @@
-#!/usr/bin/env bash
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p rofi
+# shellcheck shell=bash
 
 ## Author : Aditya Shakya (adi1090x)
 ## Github : @adi1090x
@@ -15,5 +17,5 @@ theme='style-10'
 
 ## Run
 rofi \
-    -show drun \
-    -theme ${dir}/${theme}.rasi
+  -show drun \
+  -theme "${dir}"/${theme}.rasi
diff --git a/files/launchers/type-4/launcher.sh b/files/launchers/type-4/launcher.sh
index 6572cda..c996eb9 100755
--- a/files/launchers/type-4/launcher.sh
+++ b/files/launchers/type-4/launcher.sh
@@ -1,4 +1,6 @@
-#!/usr/bin/env bash
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p rofi
+# shellcheck shell=bash
 
 ## Author : Aditya Shakya (adi1090x)
 ## Github : @adi1090x
@@ -15,5 +17,5 @@ theme='style-1'
 
 ## Run
 rofi \
-    -show drun \
-    -theme ${dir}/${theme}.rasi
+  -show drun \
+  -theme "${dir}"/${theme}.rasi
diff --git a/files/launchers/type-5/launcher.sh b/files/launchers/type-5/launcher.sh
index e9d0a3a..08840aa 100755
--- a/files/launchers/type-5/launcher.sh
+++ b/files/launchers/type-5/launcher.sh
@@ -1,4 +1,6 @@
-#!/usr/bin/env bash
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p rofi
+# shellcheck shell=bash
 
 ## Author : Aditya Shakya (adi1090x)
 ## Github : @adi1090x
@@ -14,5 +16,5 @@ theme='style-1'
 
 ## Run
 rofi \
-    -show drun \
-    -theme ${dir}/${theme}.rasi
+  -show drun \
+  -theme "${dir}"/${theme}.rasi
diff --git a/files/launchers/type-6/launcher.sh b/files/launchers/type-6/launcher.sh
index c0b4d33..5b5d1b1 100755
--- a/files/launchers/type-6/launcher.sh
+++ b/files/launchers/type-6/launcher.sh
@@ -1,4 +1,6 @@
-#!/usr/bin/env bash
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p rofi
+# shellcheck shell=bash
 
 ## Author : Aditya Shakya (adi1090x)
 ## Github : @adi1090x
@@ -15,5 +17,5 @@ theme='style-1'
 
 ## Run
 rofi \
-    -show drun \
-    -theme ${dir}/${theme}.rasi
+  -show drun \
+  -theme "${dir}"/${theme}.rasi
diff --git a/files/launchers/type-7/launcher.sh b/files/launchers/type-7/launcher.sh
index aa45aa9..45a920c 100755
--- a/files/launchers/type-7/launcher.sh
+++ b/files/launchers/type-7/launcher.sh
@@ -1,4 +1,6 @@
-#!/usr/bin/env bash
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p rofi
+# shellcheck shell=bash
 
 ## Author : Aditya Shakya (adi1090x)
 ## Github : @adi1090x
@@ -15,5 +17,5 @@ theme='style-1'
 
 ## Run
 rofi \
-    -show drun \
-    -theme ${dir}/${theme}.rasi
+  -show drun \
+  -theme "${dir}"/${theme}.rasi