diff --git a/plugins/autojump/autojump.plugin.zsh b/plugins/autojump/autojump.plugin.zsh
index 50a694764..652d22696 100644
--- a/plugins/autojump/autojump.plugin.zsh
+++ b/plugins/autojump/autojump.plugin.zsh
@@ -1,6 +1,8 @@
 if [ $commands[autojump] ]; then # check if autojump is installed
   if [ -f $HOME/.autojump/etc/profile.d/autojump.zsh ]; then # manual user-local installation
     . $HOME/.autojump/etc/profile.d/autojump.zsh
+  elif [ -f $HOME/.nix-profile/etc/profile.d/autojump.zsh ]; then # nix installation
+    . $HOME/.nix-profile/etc/profile.d/autojump.zsh
   elif [ -f /usr/share/autojump/autojump.zsh ]; then # debian and ubuntu package
     . /usr/share/autojump/autojump.zsh
   elif [ -f /etc/profile.d/autojump.zsh ]; then # manual installation
diff --git a/plugins/aws/aws.plugin.zsh b/plugins/aws/aws.plugin.zsh
index 8b57d7db1..de786725f 100644
--- a/plugins/aws/aws.plugin.zsh
+++ b/plugins/aws/aws.plugin.zsh
@@ -3,19 +3,17 @@ _homebrew-installed() {
 }
 
 _awscli-homebrew-installed() {
-  brew --prefix awscli &> /dev/null
+  brew list awscli &> /dev/null
 }
 
 export AWS_HOME=~/.aws
 
 function agp {
   echo $AWS_DEFAULT_PROFILE
-  
 }
 function asp {
   export AWS_DEFAULT_PROFILE=$1
-    export RPROMPT="<aws:$AWS_DEFAULT_PROFILE>"
-    
+  export RPROMPT="<aws:$AWS_DEFAULT_PROFILE>"
 }
 function aws_profiles {
   reply=($(grep profile $AWS_HOME/config|sed -e 's/.*profile \([a-zA-Z0-9_-]*\).*/\1/'))
diff --git a/plugins/extract/extract.plugin.zsh b/plugins/extract/extract.plugin.zsh
index a6e16ddf7..898d3d36e 100644
--- a/plugins/extract/extract.plugin.zsh
+++ b/plugins/extract/extract.plugin.zsh
@@ -38,7 +38,7 @@ function extract() {
     file_name="$( basename "$1" )"
     extract_dir="$( echo "$file_name" | sed "s/\.${1##*.}//g" )"
     case "$1" in
-      (*.tar.gz|*.tgz) tar xvzf "$1" ;;
+      (*.tar.gz|*.tgz) [ -z $commands[pigz] ] && tar zxvf "$1" || pigz -dc "$1" | tar xv ;;
       (*.tar.bz2|*.tbz|*.tbz2) tar xvjf "$1" ;;
       (*.tar.xz|*.txz) tar --xz --help &> /dev/null \
         && tar --xz -xvf "$1" \
@@ -47,7 +47,7 @@ function extract() {
         && tar --lzma -xvf "$1" \
         || lzcat "$1" | tar xvf - ;;
       (*.tar) tar xvf "$1" ;;
-      (*.gz) gunzip "$1" ;;
+      (*.gz) [ -z $commands[pigz] ] && gunzip "$1" || pigz -d "$1" ;;
       (*.bz2) bunzip2 "$1" ;;
       (*.xz) unxz "$1" ;;
       (*.lzma) unlzma "$1" ;;
diff --git a/templates/zshrc.zsh-template b/templates/zshrc.zsh-template
index ba6746902..1e3ad7b85 100644
--- a/templates/zshrc.zsh-template
+++ b/templates/zshrc.zsh-template
@@ -47,14 +47,14 @@ DISABLE_AUTO_UPDATE="true"
 # Add wisely, as too many plugins slow down shell startup.
 plugins=(git)
 
-source $ZSH/oh-my-zsh.sh
-
 zstyle ':completion:*:descriptions' format '%B%d%b'
 # User configuration
 
 export PATH=$HOME/bin:/usr/local/bin:$PATH
 # export MANPATH="/usr/local/man:$MANPATH"
 
+source $ZSH/oh-my-zsh.sh
+
 # You may need to manually set your language environment
 # export LANG=en_US.UTF-8
 
diff --git a/themes/steeef.zsh-theme b/themes/steeef.zsh-theme
index 9d27410b8..e38188d35 100644
--- a/themes/steeef.zsh-theme
+++ b/themes/steeef.zsh-theme
@@ -7,6 +7,8 @@
 # git untracked files modification from Brian Carper:
 # http://briancarper.net/blog/570/git-info-in-your-zsh-prompt
 
+export VIRTUAL_ENV_DISABLE_PROMPT=1
+
 function virtualenv_info {
     [ $VIRTUAL_ENV ] && echo '('$fg[blue]`basename $VIRTUAL_ENV`%{$reset_color%}') '
 }
diff --git a/themes/superjarin.zsh-theme b/themes/superjarin.zsh-theme
index 2920d17a2..86fa9c706 100644
--- a/themes/superjarin.zsh-theme
+++ b/themes/superjarin.zsh-theme
@@ -1,11 +1,5 @@
-# Grab the current version of ruby in use (via RVM): [ruby-1.8.7]
-if [ -e ~/.rvm/bin/rvm-prompt ]; then
-  JARIN_CURRENT_RUBY_="%{$fg[white]%}[%{$fg[red]%}\$(~/.rvm/bin/rvm-prompt i v)%{$fg[white]%}]%{$reset_color%}"
-else
-  if which rbenv &> /dev/null; then
-    JARIN_CURRENT_RUBY_="%{$fg[white]%}[%{$fg[red]%}\$(rbenv version | sed -e 's/ (set.*$//')%{$fg[white]%}]%{$reset_color%}"
-  fi
-fi
+# Grab the current version of ruby in use: [ruby-1.8.7]
+JARIN_CURRENT_RUBY_="%{$fg[white]%}[%{$fg[red]%}\$(ruby_prompt_info)%{$fg[white]%}]%{$reset_color%}"
 
 # Grab the current filepath, use shortcuts: ~/Desktop
 # Append the current git branch, if in a git repository