diff --git a/manifests/force.pp b/manifests/force.pp
index e56246b..564ed75 100644
--- a/manifests/force.pp
+++ b/manifests/force.pp
@@ -5,12 +5,12 @@ define apt::force(
 	$release = 'testing',
 	$version = false
 ) {
-	
-	exec { "aptitude -y -t ${release} install ${name}":
+
+	exec { "/usr/bin/aptitude -y -t ${release} install ${name}":
 		unless => $version ? {
-			false => "dpkg -l | grep ${name}",
-			default => "dpkg -l | grep ${name} | grep ${version}"
+			false => "/usr/bin/dpkg -l | grep ${name}",
+			default => "/usr/bin/dpkg -l | grep ${name} | grep ${version}"
 		}
 	}
-	
+
 }
diff --git a/manifests/init.pp b/manifests/init.pp
index f7b7746..7513983 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -2,8 +2,8 @@
 
 class apt {
 	$root = '/etc/apt'
-	$provider = 'apt-get'
-	
+	$provider = '/usr/bin/apt-get'
+
 	file { "sources.list":
 		name => "${root}/sources.list",
 		ensure => present,
@@ -11,14 +11,14 @@ class apt {
 		group => root,
 		mode => 644,
 	}
-	
+
 	file { "sources.list.d":
 		name => "${root}/sources.list.d",
 		ensure => directory,
 		owner => root,
 		group => root,
 	}
-	
+
 	exec { "apt_update":
 		command => "${provider} update",
 		subscribe => [ File["sources.list"], File["sources.list.d"] ],
diff --git a/manifests/pin.pp b/manifests/pin.pp
index 5a9dae6..e8b251f 100644
--- a/manifests/pin.pp
+++ b/manifests/pin.pp
@@ -7,7 +7,7 @@ define apt::pin(
 ) {
 
 	include apt
-	
+
 	file { "${name}.pref":
 		name => "${apt::root}/preferences.d/${name}",
 		ensure => file,
diff --git a/manifests/ppa.pp b/manifests/ppa.pp
index 75f0a69..51959cf 100644
--- a/manifests/ppa.pp
+++ b/manifests/ppa.pp
@@ -1,10 +1,10 @@
 # ppa.pp
 
 define apt::ppa(
-	
+
 ) {
 	include apt
-	
+
 	exec { "/usr/bin/add-apt-repository ${name}":
 		require => Package["python-software-properties"],
 		# TODO: unless => 'check'
diff --git a/manifests/release.pp b/manifests/release.pp
index 294bb78..cdd3da0 100644
--- a/manifests/release.pp
+++ b/manifests/release.pp
@@ -4,11 +4,11 @@ define apt::release (
 
 ) {
 	include apt
-	
+
 	file { "${apt::root}/apt.conf.d/01release":
 		owner => root,
 		group => root,
 		mode => 644,
 		content => "APT::Default-Release \"${name}\";"
-	}	
+	}
 }
diff --git a/manifests/source.pp b/manifests/source.pp
index e9fa308..d6d93e4 100644
--- a/manifests/source.pp
+++ b/manifests/source.pp
@@ -22,27 +22,27 @@ define apt::source(
 		mode => 644,
 		content => template("apt/source.list.erb"),
 	}
-	
+
 	if $pin != false {
 		apt::pin { "${release}": priority => "${pin}" }
 	}
-	
+
 	exec { "${name} apt update":
 		command => "${apt::provider} update",
 		subscribe => File["${name}.list"],
 		refreshonly => true,
 	}
-	
+
 	if $required_packages != false {
 		exec { "${apt::provider} -y install ${required_packages}":
 			subscribe => File["${name}.list"],
 			refreshonly => true,
 		}
 	}
-	
+
 	if $key != false {
-		exec { "apt-key adv --keyserver ${key_server} --recv-keys ${key}":
-			unless => "apt-key list | grep ${key}",
+		exec { "/usr/bin/apt-key adv --keyserver ${key_server} --recv-keys ${key}":
+			unless => "/usr/bin/apt-key list | grep ${key}",
 			before => File["${name}.list"],
 		}
 	}