diff --git a/homebrew/brew_utils b/homebrew/brew_utils
index 21e7cd0..d35991a 100644
--- a/homebrew/brew_utils
+++ b/homebrew/brew_utils
@@ -16,8 +16,8 @@ function brew_prefix
   end
 end
 
-function brew_tap
-  brew tap "$argv[1]" &>/dev/null
+function brew_tap -a $tap
+  brew tap "$tap" &>/dev/null
 end
 
 function brew_update
@@ -30,12 +30,7 @@ end
 
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
-function brew_install
-  set -f formula_readable_name $argv[1]
-  set -f formula $argv[2]
-  set -f arguments $argv[3]
-  set -f tap_value $argv[4]
-
+function brew_install -a $formula_readable_name $formula $arguments $tap_value
   # Check that Homebrew is installed
   if ! cmd_exists "brew"
     print_error "$formula_readable_name ('Homebrew' is not installed)"
diff --git a/homebrew/os/pref.sh b/homebrew/os/pref.sh
deleted file mode 100755
index e69de29..0000000
diff --git a/script/dot b/script/dot
index 322d033..f5c9ed2 100755
--- a/script/dot
+++ b/script/dot
@@ -21,10 +21,7 @@ end
 #                               Symlink Dotfiles                               #
 ################################################################################
 
-function link_file
-  set -f src $argv[1]
-  set -f dst $argv[2]
-
+function link_file -a $src $dst
   set -f action
 
   if [ -f "$dst" ] || [ -d "$dst" ] || [ -L "$dst" ]
@@ -91,10 +88,10 @@ function link_file
   end
 end
 
-function make_dst
+function make_dst -a $src
   set -l path (string replace -a '/' '\/' "$DOT")
   set -l regex (string join '' '^' "$path" '\/[a-zA-Z]+\/(.+)\.symlink$')
-  set -l dst (string replace -r $regex '$1' "$argv[1]")
+  set -l dst (string replace -r $regex '$1' "$src")
 
   printf '%s' "$HOME/$dst"
 end
diff --git a/script/utils b/script/utils
index 710e206..b36f819 100755
--- a/script/utils
+++ b/script/utils
@@ -2,57 +2,57 @@
 
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
 
-function print_in_color
+function print_in_color -a $color $text
   printf '%b' \
-    "$(tput setaf $argv[2] 2> /dev/null)" \
-    $argv[1] \
+    "$(tput setaf $color 2> /dev/null)" \
+    $text \
     "$(tput sgr0 2> /dev/null)"
 end
 
-function print_in_red
-  print_in_color $argv[1] 1
+function print_in_red -a $text
+  print_in_color $text 1
 end
 
-function print_in_yellow
-  print_in_color $argv[1] 3
+function print_in_yellow -a $text
+  print_in_color $text 3
 end
 
-function print_in_green
-  print_in_color $argv[1] 2
+function print_in_green -a $text
+  print_in_color $text 2
 end
 
-function print_in_purple
-  print_in_color $argv[1] 5
+function print_in_purple -a $text
+  print_in_color $text 5
 end
 
-function print_title
-  print_in_purple "\n • $argv[1]\n\n"
+function print_title -a $text
+  print_in_purple "\n • $text\n\n"
 end
 
-function print_success
-  print_in_green "   [✔] $argv[1]\n"
+function print_success -a $text
+  print_in_green "   [✔] $text\n"
 end
 
-function print_warning
-  print_in_yellow "   [!] $argv[1]\n"
+function print_warning -a $text
+  print_in_yellow "   [!] $text\n"
 end
 
-function print_error
-  print_in_red "   [✖] $argv[1] $argv[2]\n"
+function print_error -a $text $text2
+  print_in_red "   [✖] $text $text2\n"
 end
 
-function print_question
-  print_in_yellow "   [?] $argv[1]\n"
+function print_question -a $text
+  print_in_yellow "   [?] $text\n"
 end
 
-function print_result
-  if [ "$argv[1]" -eq 0 ]
-    print_success $argv[2]
+function print_result -a $exit_code $text
+  if [ "$exit_code" -eq 0 ]
+    print_success $text
   else
-    print_error $argv[2]
+    print_error $text
   end
 
-  return $argv[1]
+  return $exit_code
 end
 
 function print_error_stream
@@ -63,15 +63,11 @@ end
 
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
 
-function show_spinner
+function show_spinner -a $pid $cmds $msg
   set -l frames '/-\|'
 
   set -l number_of_frames (string length $FRAMES)
 
-  set -l pid $argv[1]
-  set -l cmds $argv[2]
-  set -l msg $argv[3]
-
   set -l i 0
   set -l frame_text ""
 
@@ -95,9 +91,9 @@ end
 
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
 
-function set_trap
-  trap -p "$argv[1]" | grep "$argv[2]" &> /dev/null \
-    || trap "$argv[2]" "$argv[1]"
+function set_trap -a $sig $func
+  trap -p "$sig" | grep "$func" &> /dev/null \
+    || trap "$func" "$sig"
 end
 
 function kill_all_subproccesses
@@ -111,9 +107,8 @@ end
 
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
 
-function execute
-  set -l cmds $argv[1]
-  set -q $argv[2] and set -l msg $argv[2] or set -l msg $argv[1]
+function execute -a $cmds
+  set -q $argv[2] and set -l msg $argv[2] or set -l msg "$cmds"
 
   set -l tmp_file "$(mktmp /tmp/XXXXX)"