diff --git a/dev/pyenv/install b/dev/pyenv/install
index 97de08e0..a6876622 100755
--- a/dev/pyenv/install
+++ b/dev/pyenv/install
@@ -2,7 +2,6 @@
 
 if [[ -d "$HOME/.pyenv" ]]; then
     >&2 echo "~/.pyenv already exists, can't install."
-    exit 1
 else
     git clone https://github.com/yyuu/pyenv.git $HOME/.pyenv
 fi
diff --git a/dev/rbenv/install b/dev/rbenv/install
index ef8a2f02..f51cdb26 100755
--- a/dev/rbenv/install
+++ b/dev/rbenv/install
@@ -2,7 +2,6 @@
 
 if [[ -d "$HOME/.rbenv" ]]; then
     >&2 echo "~/.rbenv already exists, can't install."
-    exit 1
 else
     git clone https://github.com/rbenv/rbenv.git $HOME/.rbenv
     git clone https://github.com/rbenv/ruby-build.git $HOME/.rbenv/plugins/ruby-build
diff --git a/editor/neovim/install b/editor/neovim/install
index aa5ba9d3..8cb3a4d7 100755
--- a/editor/neovim/install
+++ b/editor/neovim/install
@@ -2,7 +2,7 @@
 
 case $OSTYPE in
     darwin*)
-	command -v nvim >/dev/null || brew install --HEAD neovim/neovim/neovim
+        command -v nvim >/dev/null || brew install --HEAD neovim/neovim/neovim
         ;;
     linux*)
         if [[ -f /etc/arch-release ]]; then
diff --git a/editor/neovim/update b/editor/neovim/update
index 3066f174..de3fa84d 100755
--- a/editor/neovim/update
+++ b/editor/neovim/update
@@ -1,7 +1,5 @@
 #!/usr/bin/env bash
 
-command -v nvim >/dev/null || exit
-
 if [[ -d "$HOME/.vim" ]]; then
     cd "$HOME/.vim"
     make update
diff --git a/editor/vim/install b/editor/vim/install
index 16416c7f..d038c8ff 100755
--- a/editor/vim/install
+++ b/editor/vim/install
@@ -7,9 +7,6 @@ case $OSTYPE in
     linux*)
         if [[ -f /etc/arch-release ]]; then
             sudo pacman --needed --noconfirm -S make vim
-        elif [[ -f /etc/debian_version ]]; then
-            # TODO
-            exit 1
         fi
         ;;
 esac
diff --git a/editor/vimlite/install b/editor/vimlite/install
index 60b4bceb..35765d71 100755
--- a/editor/vimlite/install
+++ b/editor/vimlite/install
@@ -9,7 +9,6 @@ case $OSTYPE in
             sudo pacman --needed --noconfirm -S vim
         elif [[ -f /etc/debian_version ]]; then
             sudo apt-get install -y vim
-            exit 1
         fi
         ;;
 esac
diff --git a/vcs/git/install b/vcs/git/install
index 424cc123..fe9da108 100755
--- a/vcs/git/install
+++ b/vcs/git/install
@@ -1,7 +1,5 @@
 #!/bin/bash
 
-command -v git >/dev/null && command -v hub >/dev/null && exit
-
 case "$OSTYPE" in
     darwin*)
         brew install git hub
@@ -11,8 +9,10 @@ case "$OSTYPE" in
             sudo pacman --needed --noconfirm -S git hub
         elif [[ -f /etc/debian-version ]]; then
             sudo apt-get install -y git
-            mkdir -p $HOME/builds && cd $HOME/builds
-            git clone https://github.com/github/hub.git && cd hub
-            make install prefix=/usr/local
+            if ! command -v hub >/dev/null; then
+                mkdir -p $HOME/builds && cd $HOME/builds
+                git clone https://github.com/github/hub.git && cd hub
+                make install prefix=/usr/local
+            fi
         fi
 esac
diff --git a/vcs/hg/install b/vcs/hg/install
index 1f74566e..968a3017 100755
--- a/vcs/hg/install
+++ b/vcs/hg/install
@@ -1,14 +1,12 @@
 #!/bin/bash
 
-command -v hg >/dev/null && exit
-
-case "$OSTYPE" in
+case $OSTYPE in
     darwin*)
         brew install mercurial
         ;;
     linux*)
         if [ -f /etc/arch-release ]; then
-            sudo pacman --noconfirm -S mercurial
+            sudo pacman --needed --noconfirm -S mercurial
         elif [ -f /etc/debian-version ]; then
             sudo apt-get -y mercurial
         fi