diff --git a/install-hooks/font/pre-install b/install-hooks/font/pre-install
index 79b6c3a..d938d05 100755
--- a/install-hooks/font/pre-install
+++ b/install-hooks/font/pre-install
@@ -1,11 +1,13 @@
 #!/bin/sh
 
-sub="$HOME/.local/share/fonts"
+set -e
 
-mkdir -p "$sub"
-cd "$sub"
+sub="${HOME}/.local/share/fonts"
+
+mkdir -p "${sub}"
+cd "${sub}"
 wget 'https://github.com/ryanoasis/nerd-fonts/releases/download/v2.1.0/FiraCode.zip'
-unzip FiraCode.zip -d "$sub"
+unzip FiraCode.zip -d "${sub}"
 git clone 'https://github.com/powerline/fonts.git' --depth=1
 cd fonts
-./install.sh
\ No newline at end of file
+./install.sh
diff --git a/install-hooks/gpg/post-install b/install-hooks/gpg/post-install
index 826aa41..b55c96a 100755
--- a/install-hooks/gpg/post-install
+++ b/install-hooks/gpg/post-install
@@ -1,4 +1,5 @@
 #!/bin/sh
 
-cat "$SUB/.gnupg/gpg.conf" >> "$HOME/.gnupg/gpg.conf"
-echo -e "default-cache-ttl 1\nmax-cache-ttl 1" > "$HOME/.gnupg/gpg-agent.conf"; echo RELOADAGENT | gpg-connect-agent
\ No newline at end of file
+cat "${SUB}/.gnupg/gpg.conf" >> "${HOME}/.gnupg/gpg.conf"
+printf "%s\n%s" "default-cache-ttl 1" "max-cache-ttl 1" > "${HOME}/.gnupg/gpg-agent.conf"
+echo RELOADAGENT | gpg-connect-agent
diff --git a/install-hooks/ranger/post-install b/install-hooks/ranger/post-install
index 0048cfd..2fbdfab 100755
--- a/install-hooks/ranger/post-install
+++ b/install-hooks/ranger/post-install
@@ -1,4 +1,4 @@
 #!/bin/sh
 
-mkdir -p "$SANDBOX_PATH/.config/ranger/plugins"
-git clone https://github.com/alexanderjeurissen/ranger_devicons "$SANDBOX_PATH/.config/ranger/plugins/ranger_devicons"
\ No newline at end of file
+mkdir -p "${SANDBOX_PATH}/.config/ranger/plugins"
+git clone https://github.com/alexanderjeurissen/ranger_devicons "${SANDBOX_PATH}/.config/ranger/plugins/ranger_devicons"
diff --git a/install-hooks/ssh/post-install b/install-hooks/ssh/post-install
index f12fa6a..c9a808a 100755
--- a/install-hooks/ssh/post-install
+++ b/install-hooks/ssh/post-install
@@ -1,3 +1,3 @@
 #!/bin/sh
 
-cat "$SUB/.ssh/config" >> "$HOME/.ssh/config"
\ No newline at end of file
+cat "${SUB}/.ssh/config" >> "${HOME}/.ssh/config"
diff --git a/install-hooks/tmux/post-install b/install-hooks/tmux/post-install
index e3fb9f2..d1d7ee3 100755
--- a/install-hooks/tmux/post-install
+++ b/install-hooks/tmux/post-install
@@ -1,4 +1,4 @@
 #!/bin/sh
 
 command -v systemctl >/dev/null && systemctl --user enable --now tmux
-git clone https://github.com/tmux-plugins/tpm "$HOME/.config/tmux/plugins/tpm" | true
\ No newline at end of file
+git clone https://github.com/tmux-plugins/tpm "${HOME}/.config/tmux/plugins/tpm" | true