diff --git a/env.sh b/env.sh
index 8513e11..0ce44fd 100755
--- a/env.sh
+++ b/env.sh
@@ -67,6 +67,7 @@ case "$PM" in
             build-essential \
             unzip p7zip \
             openssh-client \
+            curl wget \
             man sudo
         ;;
     pacman)
@@ -74,6 +75,7 @@ case "$PM" in
             base-devel \
             unzip p7zip \
             openssh \
+            curl wget \
             man sudo
         # install yay
         if ! which yay; then
diff --git a/gui/install.sh b/gui/install.sh
index afa1049..e830294 100755
--- a/gui/install.sh
+++ b/gui/install.sh
@@ -46,7 +46,7 @@ case "$PM" in
             wget http://mirrors.163.com/debian/pool/main/f/fonts-wqy-microhei/$DEB_PKG_NAME -O /tmp/$DEB_PKG_NAME
         ar p /tmp/$DEB_PKG_NAME data.tar.xz | sudo tar Jxv -C /
         # install symbola for plain emojis(no-color) for st
-        yay -S --needed ttf-symbola-free
+        ! fc-list | grep -qi symbola && yay -S --needed ttf-symbola-free
         # clipboard
         sudo pacman -S --needed \
             xclip xsel
@@ -64,7 +64,7 @@ case "$PM" in
             sudo systemctl start bluetooth
         fi
         # for setting up default programs: exo-preferred-applications
-        sudo pacman -S --needed
+        sudo pacman -S --needed \
             exfat-utils \
             axel \
             exo
@@ -74,6 +74,7 @@ esac
 
 # install hermit nerd font
 install-nerdfont () {
+    grep -F "$*" /usr/local/share/fonts/nerdfont && return
     ORIGIN_NAME=$1
     PATCHED_PAT=$2
     VERSION=$3
@@ -87,6 +88,7 @@ install-nerdfont () {
         $LOCAL_REPO_PATH
     sudo 7z x -x!'*Windows*' -aoa $LOCAL_REPO_PATH/$NAME -o/usr/local/share/fonts
     sudo chmod +rx /usr/local/share/fonts
+    echo "$*" | sudo tee -a /usr/local/share/fonts/nerdfont
     echo $LOCAL_REPO_PATH
     rm -rf $LOCAL_REPO_PATH
 }
diff --git a/picom/config/launch.sh b/picom/config/launch.sh
index b8f50d4..a36b535 100755
--- a/picom/config/launch.sh
+++ b/picom/config/launch.sh
@@ -4,5 +4,7 @@ DIR=$(readlink -f $(dirname $0))
 
 killall -q picom
 while pgrep -x picom >/dev/null; do sleep 1; done
-picom -b --config $DIR/picom.conf --experimental-backends --blur-method dual_kawase --blur-strength 6 --no-fading-openclose
-#picom -b --config $DIR/picom.conf
+picom -b --config $DIR/picom.conf --experimental-backends \
+    --blur-method dual_kawase --blur-strength 6 \
+    --no-fading-openclose || \
+picom -b --config $DIR/picom.conf --no-fading-openclose
diff --git a/picom/install.sh b/picom/install.sh
index 7e42011..4e51d71 100755
--- a/picom/install.sh
+++ b/picom/install.sh
@@ -21,17 +21,19 @@ case "$PM" in
 esac
 
 # build and install picom
-VERSION=next
+VERSION=v8.2
 VERSION_PATH=$XDG_CONFIG_HOME/picom/version
 if [ "$VERSION" = "next" ] || ! eqv "$VERSION_PATH" "$VERSION"; then
     echo Downloading picom $VERSION
-    rm -rf /tmp/picom.zip
-    curl "https://github.com/yshui/picom/archive/$VERSION.zip" -Lo /tmp/picom-$VERSION.zip
+    [ ! -f /tmp/picom-$VERSION.zip ] && \
+        curl "https://github.com/yshui/picom/archive/$VERSION.zip" -Lo /tmp/picom-$VERSION.zip
     unzip /tmp/picom-$VERSION.zip -d /tmp
-    pushd /tmp/picom-$VERSION
+    FD=$(unzip -l /tmp/picom-$VERSION.zip | awk 'NR==5{print $4}')
+    pushd /tmp/$FD
     meson --buildtype=release . build
     sudo ninja -C build install
     popd
+    mkdir -p $(dirname $VERSION_PATH)
     echo "$VERSION" > "$VERSION_PATH"
     sudo rm -rf /tmp/picom-$VERSION*
 fi
diff --git a/suckless/install.sh b/suckless/install.sh
index e3354a6..ed78898 100755
--- a/suckless/install.sh
+++ b/suckless/install.sh
@@ -40,16 +40,16 @@ esac
 # clone / compile utilities and dwm itself
 mkdir -p ~/Projects/suckless
 
-[! -d ~/Projects/suckless/st] && git clone https://gitee.com/klesh/st.git ~/Projects/suckless/st
+[ ! -d ~/Projects/suckless/st ] && git clone https://gitee.com/klesh/st.git ~/Projects/suckless/st
 cd ~/Projects/suckless/st && sudo rm -f config.h && sudo make clean install
 
-[! -d ~/Projects/suckless/dmenu] &&git clone https://gitee.com/klesh/dmenu.git ~/Projects/suckless/dmenu
+[ ! -d ~/Projects/suckless/dmenu ] &&git clone https://gitee.com/klesh/dmenu.git ~/Projects/suckless/dmenu
 cd ~/Projects/suckless/dmenu && sudo rm -f config.h && sudo make clean install
 
-[! -d ~/Projects/suckless/slock] &&git clone https://gitee.com/klesh/slock.git ~/Projects/suckless/slock
+[ ! -d ~/Projects/suckless/slock ] &&git clone https://gitee.com/klesh/slock.git ~/Projects/suckless/slock
 cd ~/Projects/suckless/slock && sudo rm -f config.h && sudo make clean install
 
-[! -d ~/Projects/suckless/dwm] &&git clone https://gitee.com/klesh/dwm.git ~/Projects/suckless/dwm
+[ ! -d ~/Projects/suckless/dwm ] &&git clone https://gitee.com/klesh/dwm.git ~/Projects/suckless/dwm
 cd ~/Projects/suckless/dwm && sudo rm -f config.h && sudo make clean install
 
 # config xinit to start for dwm
@@ -80,7 +80,7 @@ EOT
 
 # config dwm
 [[ -L $XDG_CONFIG_HOME/dwm/autostart ]] && rm $XDG_CONFIG_HOME/dwm/autostart
-mkdir -p $DIR/config/dwm
+mkdir -p $XDG_CONFIG_HOME/dwm
 cp $DIR/config/dwm/autostart $XDG_CONFIG_HOME/dwm/autostart
 lnsf $DIR/config/dwm/dwmbar $XDG_CONFIG_HOME/dwm/dwmbar
 lnsf $DIR/config/autorandr/postswitch $XDG_CONFIG_HOME/autorandr/postswitch