diff --git a/apps/docker.sh b/apps/docker.sh
index 7c9a7a0..37fd3cb 100755
--- a/apps/docker.sh
+++ b/apps/docker.sh
@@ -12,7 +12,7 @@ case "$PM" in
         sudo pip3 install docker-compose
         ;;
     pacman)
-        sudo pacman -S docker docker-compose
+        sudo pacman -S --needed docker docker-compose
         ;;
 esac
 
diff --git a/apps/install.sh b/apps/install.sh
index 34611d7..89353e6 100755
--- a/apps/install.sh
+++ b/apps/install.sh
@@ -15,7 +15,7 @@ case "$PM" in
             gimp
         ;;
     pacman)
-        sudo pacman -S \
+        sudo pacman -S --needed \
             chromium \
             zathura zathura-pdf-mupdf sxiv\
             flameshot \
diff --git a/apps/keepassxc.sh b/apps/keepassxc.sh
index 984a00c..c87d35d 100755
--- a/apps/keepassxc.sh
+++ b/apps/keepassxc.sh
@@ -12,7 +12,7 @@ case "$PM" in
         sudo apt install -y keepassxc
         ;;
     pacman)
-        sudo pacman -S keepassxc
+        sudo pacman -S --needed keepassxc
         ;;
 esac
 
diff --git a/apps/nextcloud.sh b/apps/nextcloud.sh
index 24f9661..49cde37 100755
--- a/apps/nextcloud.sh
+++ b/apps/nextcloud.sh
@@ -12,6 +12,6 @@ case "$PM" in
         sudo apt install -y nextcloud-client
         ;;
     pacman)
-        sudo pacman -S nextcloud-client
+        sudo pacman -S --needed nextcloud-client
         ;;
 esac
diff --git a/dunst/install.sh b/dunst/install.sh
index 88fa04e..04689aa 100755
--- a/dunst/install.sh
+++ b/dunst/install.sh
@@ -9,7 +9,7 @@ case "$PM" in
         sudo apt install -y dunst
         ;;
     pacman)
-        sudo pacman -S dunst
+        sudo pacman -S --needed dunst
         ;;
 esac
 
diff --git a/env.sh b/env.sh
index 64e54d2..13f0581 100755
--- a/env.sh
+++ b/env.sh
@@ -32,7 +32,10 @@ lnsf () {
     [ "$#" -ne 2 ] && echo "lnsf <src> <symlink>"
     [ ! -L "$2" ] && rm -rf $2
     SYM_DIR=$(dirname $2)
-    [ -n "$SYM_DIR" ] && mkdir -p $SYM_DIR
+    if [ -n "$SYM_DIR" ]; then
+        [ ! -d "$SYM_DIR" ] && rm -rf "$SYM_DIR"
+        mkdir -p "$SYM_DIR"
+    fi
     ln -sf $1 $2
 }
 
@@ -57,7 +60,7 @@ case "$PM" in
             man sudo
         ;;
     pacman)
-        sudo pacman -S \
+        sudo pacman -S --needed --needed \
             base-devel \
             unzip p7zip \
             openssh \
diff --git a/fish/config/config.fish b/fish/config/config.fish
index 6aad360..8a756fb 100644
--- a/fish/config/config.fish
+++ b/fish/config/config.fish
@@ -16,12 +16,6 @@ function source-file-if-exists
   end
 end
 
-if not functions -q fisher
-    set -q XDG_CONFIG_HOME; or set XDG_CONFIG_HOME ~/.config
-    curl https://git.io/fisher --create-dirs -sLo $XDG_CONFIG_HOME/fish/functions/fisher.fish
-    fish -c fisher
-end
-
 source-file-if-exists /usr/share/autojump/autojump.fish
 source-file-if-exists /usr/local/share/autojump/autojump.fish
 append-path-if-exists ~/.local/bin
diff --git a/fish/config/functions/fisher.fish b/fish/config/functions/fisher.fish
new file mode 100644
index 0000000..71f20a8
--- /dev/null
+++ b/fish/config/functions/fisher.fish
@@ -0,0 +1,436 @@
+set -g fisher_version 3.3.2
+
+function fisher -a cmd -d "fish plugin manager"
+    set -q XDG_CACHE_HOME; or set XDG_CACHE_HOME ~/.cache
+    set -q XDG_CONFIG_HOME; or set XDG_CONFIG_HOME ~/.config
+    set -q XDG_DATA_HOME; or set XDG_DATA_HOME ~/.local/share
+
+    set -g fish_config $XDG_CONFIG_HOME/fish
+    set -g fisher_cache $XDG_CACHE_HOME/fisher
+    set -g fisher_data $XDG_DATA_HOME/fisher
+
+    set -q fisher_path; or set -g fisher_path $fish_config
+    set -g fishfile $fish_config/fishfile
+
+    for path in {$fish_config,$fisher_path}/{functions,completions,conf.d} $fisher_cache
+        if test ! -d $path
+            command mkdir -p $path
+        end
+    end
+
+    if test ! -e $fisher_path/completions/fisher.fish
+        echo "fisher complete" >$fisher_path/completions/fisher.fish
+        _fisher_complete
+    end
+
+    if test -e $fisher_path/conf.d/fisher.fish
+        switch "$version"
+            case \*-\*
+                command rm -f $fisher_path/conf.d/fisher.fish
+            case 2\*
+            case \*
+                command rm -f $fisher_path/conf.d/fisher.fish
+        end
+    else
+        switch "$version"
+            case \*-\*
+            case 2\*
+                echo "fisher copy-user-key-bindings" >$fisher_path/conf.d/fisher.fish
+        end
+    end
+
+    # 2019-10-22: temp code, migrates fishfile from old path back to $fish_config
+    if test -e "$fisher_path/fishfile"; and test ! -e "$fishfile"
+        command mv -f "$fisher_path/fishfile" "$fishfile"
+    end
+
+    # 2020-06-23: temp code, migrates fisher data from XDG_CONFIG_HOME to XDG_DATA_HOME
+    set -l fisher_config $XDG_CONFIG_HOME/fisher
+    if test -d $fisher_config
+        echo "migrating local data from $fisher_config to $fisher_data"
+        command rm -rf $fisher_data
+        command mv -f $fisher_config $fisher_data
+    end
+
+    switch "$cmd"
+        case {,self-}complete
+            _fisher_complete
+        case copy-user-key-bindings
+            _fisher_copy_user_key_bindings
+        case ls
+            set -e argv[1]
+            if test -s "$fishfile"
+                set -l file (_fisher_fmt <$fishfile | _fisher_parse -R | command sed "s|@.*||")
+                _fisher_ls | _fisher_fmt | command awk -v FILE="$file" "
+                    BEGIN { for (n = split(FILE, f); ++i <= n;) file[f[i]] } \$0 in file && /$argv[1]/
+                " | command sed "s|^$HOME|~|"
+            end
+        case self-update
+            _fisher_self_update (status -f)
+        case self-uninstall
+            _fisher_self_uninstall
+        case {,-}-v{ersion,}
+            echo "fisher version $fisher_version" (status -f | command sed "s|^$HOME|~|")
+        case {,-}-h{elp,}
+            _fisher_help
+        case ""
+            _fisher_commit --
+        case add rm
+            if not isatty
+                while read -l arg
+                    set argv $argv $arg
+                end
+            end
+
+            if test (count $argv) = 1
+                echo "fisher: invalid number of arguments" >&2
+                _fisher_help >&2
+                return 1
+            end
+
+            _fisher_commit $argv
+        case \*
+            echo "fisher: unknown flag or command \"$cmd\"" >&2
+            _fisher_help >&2
+            return 1
+    end
+end
+
+function _fisher_complete
+    complete -ec fisher
+    complete -xc fisher -n __fish_use_subcommand -a add -d "Add plugins"
+    complete -xc fisher -n __fish_use_subcommand -a rm -d "Remove plugins"
+    complete -xc fisher -n __fish_use_subcommand -a ls -d "List installed plugins matching REGEX"
+    complete -xc fisher -n __fish_use_subcommand -a --help -d "Show usage help"
+    complete -xc fisher -n __fish_use_subcommand -a --version -d "$fisher_version"
+    complete -xc fisher -n __fish_use_subcommand -a self-update -d "Update to the latest version"
+    for pkg in (fisher ls)
+        complete -xc fisher -n "__fish_seen_subcommand_from rm" -a $pkg
+    end
+end
+
+function _fisher_copy_user_key_bindings
+    if functions -q fish_user_key_bindings
+        functions -c fish_user_key_bindings fish_user_key_bindings_copy
+    end
+    function fish_user_key_bindings
+        for file in $fisher_path/conf.d/*_key_bindings.fish
+            source $file >/dev/null 2>/dev/null
+        end
+        if functions -q fish_user_key_bindings_copy
+            fish_user_key_bindings_copy
+        end
+    end
+end
+
+function _fisher_ls
+    for pkg in $fisher_data/*/*/*
+        command readlink $pkg; or echo $pkg
+    end
+end
+
+function _fisher_fmt
+    command sed "s|^[[:space:]]*||;s|^$fisher_data/||;s|^~|$HOME|;s|^\.\/*|$PWD/|;s|^https*:/*||;s|^github\.com/||;s|/*\$||"
+end
+
+function _fisher_help
+    echo "usage: fisher add <plugin...>     Add plugin/s"
+    echo "       fisher rm  <plugin...>     Remove plugin/s"
+    echo "       fisher                     Update all plugins"
+    echo "       fisher ls  [<regex>]       List installed plugins matching <regex>"
+    echo "       fisher --help              Show this help"
+    echo "       fisher --version           Show the current version"
+    echo "       fisher self-update         Update to the latest version"
+    echo "       fisher self-uninstall      Uninstall from your system"
+    echo "examples:"
+    echo "       fisher add jorgebucaran/z rafaelrinaldi/pure"
+    echo "       fisher add gitlab.com/foo/bar@v2"
+    echo "       fisher add ~/path/to/local/pkg"
+    echo "       fisher add <file"
+    echo "       fisher rm rafaelrinaldi/pure"
+    echo "       fisher ls | fisher rm"
+end
+
+function _fisher_self_update -a file
+    set -l url "https://raw.githubusercontent.com/jorgebucaran/fisher/main/fisher.fish"
+    echo "fetching $url" >&2
+    command curl -s "$url?nocache" >$file.
+
+    set -l next_version (command awk '$4 ~ /^[0-9]+\.[0-9]+\.[0-9]+$/ { print v=$4 } { exit !v }' <$file.)
+    switch "$next_version"
+        case "" $fisher_version
+            command rm -f $file.
+            if test -z "$next_version"
+                echo "fisher: cannot update fisher -- are you offline?" >&2
+                return 1
+            end
+            echo "fisher is already up-to-date" >&2
+        case \*
+            echo "linking $file" | command sed "s|$HOME|~|" >&2
+            command mv -f $file. $file
+            source $file
+            echo "updated to fisher $fisher_version -- hooray!" >&2
+            _fisher_complete
+    end
+end
+
+function _fisher_self_uninstall
+    for pkg in (_fisher_ls)
+        _fisher_rm $pkg
+    end
+
+    for file in $fisher_cache $fisher_data $fisher_path/{functions,completions,conf.d}/fisher.fish $fishfile
+        echo "removing $file"
+        command rm -Rf $file 2>/dev/null
+    end | command sed "s|$HOME|~|" >&2
+
+    for name in (set -n | command awk '/^fisher_/')
+        set -e "$name"
+    end
+
+    functions -e (functions -a | command awk '/^_fisher/') fisher
+    complete -c fisher --erase
+end
+
+function _fisher_commit -a cmd
+    set -e argv[1]
+    set -l elapsed (_fisher_now)
+
+    if test ! -e "$fishfile"
+        command touch $fishfile
+        echo "created new fishfile in $fishfile" | command sed "s|$HOME|~|" >&2
+    end
+
+    set -l old_pkgs (_fisher_ls | _fisher_fmt)
+    for pkg in (_fisher_ls)
+        _fisher_rm $pkg
+    end
+    command rm -Rf $fisher_data
+    command mkdir -p $fisher_data
+
+    set -l next_pkgs (_fisher_fmt <$fishfile | _fisher_parse -R $cmd (printf "%s\n" $argv | _fisher_fmt))
+    set -l actual_pkgs (_fisher_fetch $next_pkgs)
+    set -l updated_pkgs
+    for pkg in $old_pkgs
+        if contains -- $pkg $actual_pkgs
+            set updated_pkgs $updated_pkgs $pkg
+        end
+    end
+
+    if test -z "$actual_pkgs$updated_pkgs$old_pkgs$next_pkgs"
+        echo "fisher: nothing to commit -- try adding some plugins" >&2
+        return 1
+    end
+
+    set -l out_pkgs
+    if test "$cmd" = "rm"
+        set out_pkgs $next_pkgs
+    else
+        for pkg in $next_pkgs
+            if contains -- (echo $pkg | command sed "s|@.*||") $actual_pkgs
+                set out_pkgs $out_pkgs $pkg
+            end
+        end
+    end
+
+    printf "%s\n" (_fisher_fmt <$fishfile | _fisher_parse -W $cmd $out_pkgs | command sed "s|^$HOME|~|") >$fishfile
+
+    _fisher_complete
+
+    command awk -v A=(count $actual_pkgs) -v U=(count $updated_pkgs) -v O=(count $old_pkgs) -v E=(_fisher_now $elapsed) '
+        BEGIN {
+            res = fmt("removed", O - U, fmt("updated", U, fmt("added", A - U)))
+            printf((res ? res : "done") " in %.2fs\n", E / 1000)
+        }
+        function fmt(action, n, s) {
+            return n ? (s ? s ", " : s) action " " n " plugin" (n > 1 ? "s" : "") : s
+        }
+    ' >&2
+end
+
+function _fisher_parse -a mode cmd
+    set -e argv[1..2]
+    command awk -v FS="[[:space:]]*#+" -v MODE="$mode" -v CMD="$cmd" -v ARGSTR="$argv" '
+        BEGIN {
+            for (n = split(ARGSTR, a, " "); i++ < n;) pkgs[getkey(a[i])] = a[i]
+        }
+        !NF { next } { k = getkey($1) }
+        MODE == "-R" && !(k in pkgs) && ($0 = $1)
+        MODE == "-W" && (/^#/ || k in pkgs || CMD != "rm") { print pkgs[k] (sub($1, "") ? $0 : "") }
+        MODE == "-W" || CMD == "rm" { delete pkgs[k] }
+        END {
+            for (k in pkgs) {
+                if (CMD != "rm" || MODE == "-W") print pkgs[k]
+                else print "fisher: cannot remove \""k"\" -- plugin is not in fishfile" > "/dev/stderr"
+            }
+        }
+        function getkey(s,  a) {
+            return (split(s, a, /@+|:/) > 2) ? a[2]"/"a[1]"/"a[3] : a[1]
+        }
+    '
+end
+
+function _fisher_fetch
+    set -l pkg_jobs
+    set -l out_pkgs
+    set -l next_pkgs
+    set -l local_pkgs
+    set -q fisher_user_api_token; and set -l curl_opts -u $fisher_user_api_token
+
+    for pkg in $argv
+        switch $pkg
+            case \~\* /\*
+                set -l path (echo "$pkg" | command sed "s|^~|$HOME|")
+                if test -e "$path"
+                    set local_pkgs $local_pkgs $path
+                else
+                    echo "fisher: cannot add \"$pkg\" -- is this a valid file?" >&2
+                end
+                continue
+        end
+
+        command awk -v PKG="$pkg" -v FS=/ '
+            BEGIN {
+                split(PKG, tmp, /@/)
+                pkg = split(PKG, _, "/") <= 2 ? "github.com/"tmp[1] : tmp[1]
+                tag = tmp[2] ? tmp[2] : "HEAD"
+                print pkg "\t" (\
+                    pkg ~ /^github/ ? "https://codeload."pkg"/tar.gz/"tag : \
+                    pkg ~ /^gitlab/ ? "https://"pkg"/-/archive/"tag"/"tmp[split(pkg, tmp, "/")]"-"tag".tar.gz" : \
+                    pkg ~ /^bitbucket/ ? "https://"pkg"/get/"tag".tar.gz" : pkg\
+                )
+            }
+        ' | read -l pkg url
+
+        if test ! -d "$fisher_data/$pkg"
+            fish -c "
+                echo fetching $url >&2
+                command mkdir -p $fisher_data/$pkg $fisher_cache/(command dirname $pkg)
+                if command curl $curl_opts -Ss -w \"\" $url 2>&1 | command tar -xzf- -C $fisher_data/$pkg 2>/dev/null
+                    command rm -Rf $fisher_cache/$pkg
+                    command mv -f $fisher_data/$pkg/* $fisher_cache/$pkg
+                    command rm -Rf $fisher_data/$pkg
+                    command cp -Rf {$fisher_cache,$fisher_data}/$pkg
+                else if test -d \"$fisher_cache/$pkg\"
+                    echo fisher: cannot connect to server -- looking in \"$fisher_cache/$pkg\" | command sed 's|$HOME|~|' >&2
+                    command cp -Rf $fisher_cache/$pkg $fisher_data/$pkg/..
+                else
+                    command rm -Rf $fisher_data/$pkg
+                    echo fisher: cannot add \"$pkg\" -- is this a valid plugin\? >&2
+                end
+            " >/dev/null &
+            set pkg_jobs $pkg_jobs (_fisher_jobs --last)
+            set next_pkgs $next_pkgs "$fisher_data/$pkg"
+        end
+    end
+
+    if set -q pkg_jobs[1]
+        while for job in $pkg_jobs
+                contains -- $job (_fisher_jobs); and break
+            end
+        end
+        for pkg in $next_pkgs
+            if test -d "$pkg"
+                set out_pkgs $out_pkgs $pkg
+                _fisher_add $pkg
+            end
+        end
+    end
+
+    set -l local_prefix $fisher_data/local/$USER
+    if test ! -d "$local_prefix"
+        command mkdir -p $local_prefix
+    end
+    for pkg in $local_pkgs
+        set -l target $local_prefix/(command basename $pkg)
+        if test ! -L "$target"
+            command ln -sf $pkg $target
+            set out_pkgs $out_pkgs $pkg
+            _fisher_add $pkg --link
+        end
+    end
+
+    if set -q out_pkgs[1]
+        _fisher_fetch (
+            for pkg in $out_pkgs
+                if test -s "$pkg/fishfile"
+                    _fisher_fmt <$pkg/fishfile | _fisher_parse -R
+                end
+            end)
+        printf "%s\n" $out_pkgs | _fisher_fmt
+    end
+end
+
+function _fisher_add -a pkg opts
+    for src in $pkg/{functions,completions,conf.d}/**.* $pkg/*.fish
+        set -l target (command basename $src)
+        switch $src
+            case $pkg/conf.d\*
+                set target $fisher_path/conf.d/$target
+            case $pkg/completions\*
+                set target $fisher_path/completions/$target
+            case $pkg/{functions,}\*
+                switch $target
+                    case uninstall.fish
+                        continue
+                    case {init,key_bindings}.fish
+                        set target $fisher_path/conf.d/(command basename $pkg)\_$target
+                    case \*
+                        set target $fisher_path/functions/$target
+                end
+        end
+        echo "linking $target" | command sed "s|$HOME|~|" >&2
+        if set -q opts[1]
+            command ln -sf $src $target
+        else
+            command cp -f $src $target
+        end
+        switch $target
+            case \*.fish
+                source $target >/dev/null 2>/dev/null
+        end
+    end
+end
+
+function _fisher_rm -a pkg
+    for src in $pkg/{conf.d,completions,functions}/**.* $pkg/*.fish
+        set -l target (command basename $src)
+        set -l filename (command basename $target .fish)
+        switch $src
+            case $pkg/conf.d\*
+                test "$filename.fish" = "$target"; and emit "$filename"_uninstall
+                set target conf.d/$target
+            case $pkg/completions\*
+                test "$filename.fish" = "$target"; and complete -ec $filename
+                set target completions/$target
+            case $pkg/{,functions}\*
+                test "$filename.fish" = "$target"; and functions -e $filename
+                switch $target
+                    case uninstall.fish
+                        source $src
+                        continue
+                    case {init,key_bindings}.fish
+                        set target conf.d/(command basename $pkg)\_$target
+                    case \*
+                        set target functions/$target
+                end
+        end
+        command rm -f $fisher_path/$target
+    end
+    if not functions -q fish_prompt
+        source "$__fish_datadir$__fish_data_dir/functions/fish_prompt.fish"
+    end
+end
+
+function _fisher_jobs
+    jobs $argv | command awk '/^[0-9]+\t/ { print $1 }'
+end
+
+function _fisher_now -a elapsed
+    switch (command uname)
+        case Darwin \*BSD
+            command perl -MTime::HiRes -e 'printf("%.0f\n", (Time::HiRes::time() * 1000) - $ARGV[0])' $elapsed
+        case \*
+            math (command date "+%s%3N") - "0$elapsed"
+    end
+end
diff --git a/fish/install.sh b/fish/install.sh
index 2b3c403..bec9838 100755
--- a/fish/install.sh
+++ b/fish/install.sh
@@ -14,7 +14,7 @@ case "$PM" in
         ;;
     pacman)
         ! which pip && $ROOT/python/install.sh
-        sudo pacman -S fish xdotool
+        sudo pacman -S --needed --needed fish xdotool
         ;;
 esac
 
@@ -29,3 +29,6 @@ fi
 lnsf $DIR/config/config.fish ~/.config/fish/config.fish
 lnsf $DIR/config/functions/fish_prompt.fish ~/.config/fish/functions/fish_prompt.fish
 lnsf $DIR/config/functions/fish_right_prompt.fish ~/.config/fish/functions/fish_right_prompt.fish
+lnsf $DIR/config/functions/fisher.fish ~/.config/fish/functions/fisher.fish
+
+source ~/.config/fish/config.fish
diff --git a/gui/install.sh b/gui/install.sh
index 29cf6b5..3e6d594 100755
--- a/gui/install.sh
+++ b/gui/install.sh
@@ -27,7 +27,7 @@ case "$PM" in
         ;;
     pacman)
         # fonts
-        sudo pacman -S \
+        sudo pacman -S --needed \
             terminus-font \
             ttf-droid \
             freetype2 \
@@ -36,17 +36,17 @@ case "$PM" in
             wqy-microhei-lite \
             gucharmap
         # clipboard
-        sudo pacman -S \
+        sudo pacman -S --needed \
             xclip xsel
         # keyring
-        sudo pacman -S \
+        sudo pacman -S --needed \
             gnome-keyring libsecret
         # network manager
-        sudo pacman -S \
+        sudo pacman -S --needed \
             networkmanager network-manager-applet
         # bluetooth
         if has-bluetooth; then
-            sudo pacman -S \
+            sudo pacman -S --needed \
                 bluez bluez-utils blueman pulseaudio-bluetooth xorg-xbacklight
             sudo systemctl enable bluetooth
             sudo systemctl start bluetooth
diff --git a/gui/theme.sh b/gui/theme.sh
index 3d3c279..e48b670 100755
--- a/gui/theme.sh
+++ b/gui/theme.sh
@@ -10,7 +10,7 @@ case "$PM" in
             lxappearance arc-theme qt5ct qt5-style-plugins
         ;;
     pacman)
-        sudo pacman -S \
+        sudo pacman -S --needed \
             lxappearance arc-gtk-theme arc-icon-theme qt5ct qt5-styleplugins
         ;;
 esac
diff --git a/nodejs/install.sh b/nodejs/install.sh
index 2f2bf03..e09e64c 100755
--- a/nodejs/install.sh
+++ b/nodejs/install.sh
@@ -10,7 +10,7 @@ case "$PM" in
         sudo apt install -y nodejs yarnpkg
         ;;
     pacman)
-        sudo pacman -S nodejs yarn
+        sudo pacman -S --needed nodejs yarn
         ;;
 esac
 
diff --git a/nvim/install.sh b/nvim/install.sh
index a2918f4..c8df40c 100755
--- a/nvim/install.sh
+++ b/nvim/install.sh
@@ -14,7 +14,7 @@ case "$PM" in
         sudo apt install -y neovim
         ;;
     pacman)
-        sudo pacman -S neovim
+        sudo pacman -S --needed neovim
         ;;
 esac
 
diff --git a/picom/config/launch.sh b/picom/config/launch.sh
index 11a704e..a2b5ef7 100755
--- a/picom/config/launch.sh
+++ b/picom/config/launch.sh
@@ -4,5 +4,4 @@ DIR=$(readlink -f $(dirname $0))
 
 killall -q picom
 while pgrep -x picom >/dev/null; do sleep 1; done
-echo $DIR/picom.conf
-picom -b --config $DIR/picom.conf
+picom -b --config $DIR/picom.conf --experimental-backends --blur-method dual_kawase --blur-strength 6
diff --git a/picom/config/picom.conf b/picom/config/picom.conf
index 83493d4..18c5e78 100644
--- a/picom/config/picom.conf
+++ b/picom/config/picom.conf
@@ -190,8 +190,8 @@ blur-background-exclude = [
 # Specify the backend to use: `xrender`, `glx`, or `xr_glx_hybrid`.
 # `xrender` is the default one.
 #
-# backend = "glx"
-backend = "xrender";
+backend = "glx"
+# backend = "xrender";
 
 # Enable/disable VSync.
 # vsync = false
diff --git a/picom/install.sh b/picom/install.sh
index 108a573..d2ef322 100755
--- a/picom/install.sh
+++ b/picom/install.sh
@@ -14,22 +14,20 @@ case "$PM" in
         sudo pip3 install meson
         # install dependencies
         sudo apt install -y ninja-build libxext-dev libxcb1-dev libxcb-damage0-dev libxcb-xfixes0-dev libxcb-shape0-dev libxcb-render-util0-dev libxcb-render0-dev libxcb-randr0-dev libxcb-composite0-dev libxcb-image0-dev libxcb-present-dev libxcb-xinerama0-dev libxcb-glx0-dev libpixman-1-dev libdbus-1-dev libconfig-dev libgl1-mesa-dev  libpcre3-dev  libevdev-dev uthash-dev libev-dev libx11-xcb-dev
-        # download picom source
-        [ ! -f /tmp/picom.tar.gz ] && \
-            curl -L https://github.com/yshui/picom/archive/v8.1.tar.gz --output /tmp/picom.tar.gz
-        # build and install
-        mkdir -p /tmp/picom
-        tar zxvf /tmp/picom.tar.gz --strip 1 -C /tmp/picom
-        pushd /tmp/picom
-        #git submodule update --init --recursive
-        meson --buildtype=release . build
-        sudo ninja -C build install
-        popd
         ;;
     pacman)
-        sudo pacman -S picom
+        sudo pacman -S --needed uthash ninja meson
         ;;
 esac
 
-# symlink configuration
+# build and install picom-next
+curl -sLo https://github.com/yshui/picom/archive/next.zip /tmp/picom-next.zip
+unzip /tmp/picom-next.zip -d /tmp
+pushd /tmp/picom-next
+meson --buildtype=release . build
+sudo ninja -C build install
+popd
+rm -rf /tmp/picom*
+
+# configuration
 lnsf $DIR/config ~/.config/picom
diff --git a/player/install.sh b/player/install.sh
index 4e4c3e9..3e7008c 100755
--- a/player/install.sh
+++ b/player/install.sh
@@ -10,7 +10,7 @@ case "$PM" in
         sudo apt install -y mpd mpc ncmpcpp mpv
         ;;
     pacman)
-        sudo pacman -S mpd mpc ncmpcpp mpv
+        sudo pacman -S --needed mpd mpc ncmpcpp mpv
         ;;
 esac
 
diff --git a/python/install.sh b/python/install.sh
index 40d4efe..c314b38 100755
--- a/python/install.sh
+++ b/python/install.sh
@@ -19,7 +19,7 @@ case "$PM" in
         fish-is-default-shell && sudo pip3 install virtualfish
         ;;
     pacman)
-        sudo pacman -S python python-pip
+        sudo pacman -S --needed python python-pip
         fish-is-default-shell && sudo pip install virtualfish
         ;;
 esac
diff --git a/ranger/install.sh b/ranger/install.sh
index 3cfcca4..c68e4b3 100755
--- a/ranger/install.sh
+++ b/ranger/install.sh
@@ -10,7 +10,7 @@ case "$PM" in
         sudo pip3 install ranger-fm ueberzug
         ;;
     pacman)
-        sudo pacman -S ranger ueberzug
+        sudo pacman -S --needed ranger ueberzug
         ;;
 esac
 
diff --git a/suckless/install.sh b/suckless/install.sh
index e8dd7b5..19bdd9a 100755
--- a/suckless/install.sh
+++ b/suckless/install.sh
@@ -22,7 +22,7 @@ case "$PM" in
         sudo apt remove gdm3
         ;;
     pacman)
-        sudo pacman -S \
+        sudo pacman -S --needed \
             xorg-server xorg-xinit xorg-xrandr xorg-xev xorg-xprop \
             alsa-firmware alsa-utils alsa-plugins pulseaudio-alsa pulseaudio pavucontrol  \
             arandr autorandr \
diff --git a/thunar/install.sh b/thunar/install.sh
index 5713916..ee96f84 100755
--- a/thunar/install.sh
+++ b/thunar/install.sh
@@ -10,7 +10,7 @@ case "$PM" in
             thunar gvfs-bin gvfs-backends thunar-archive-plugin file-roller tumbler
         ;;
     pacman)
-        sudo pacman -S \
+        sudo pacman -S --needed \
             thunar gvfs-smb gvfs-mtp thunar-archive-plugin file-roller tumbler
         ;;
 esac
diff --git a/tmux/install.sh b/tmux/install.sh
index deb1174..52ce9b6 100755
--- a/tmux/install.sh
+++ b/tmux/install.sh
@@ -25,7 +25,7 @@ case "$PM" in
         rm -rf /tmp/tmux*
         ;;
     pacman)
-        sudo pacman -S tmux bc
+        sudo pacman -S --needed tmux bc
         ;;
 esac