Files are required before modification.

modules/desktop/manifests/init.pp

@@ -84,6 +84,7 @@ class desktop {
 	exec { 'fix-desktop-leafpad':
 		command => '/bin/sed -i "/^Name/ s/=.*/=Notes/;" /etc/skel/Desktop/leafpad.desktop',
 		unless => '/bin/grep -q "^Name=Notes" /etc/skel/Desktop/leafpad.desktop',
+		require => File['/etc/skel/Desktop/leafpad.desktop'],
 	}
 
 	file { '/etc/skel/Desktop/galculator.desktop':
@@ -98,6 +99,7 @@ class desktop {
 	exec { 'fix-desktop-galculator':
 		command => '/bin/sed -i "/^Name/ s/=.*/=Calculator/;" /etc/skel/Desktop/galculator.desktop',
 		unless => '/bin/grep -q "^Name.*=Calculator" /etc/skel/Desktop/galculator.desktop',
+		require => File['/etc/skel/Desktop/galculator.desktop'],
 	}
 
 	file { '/etc/skel/Desktop/chromium-l10n.desktop':
@@ -120,6 +122,7 @@ class desktop {
 	exec { 'fix-desktop-florence':
 		command => '/bin/sed -i "/^Name/ s/=.*/=Keyboard/;" /etc/skel/Desktop/florence.desktop',
 		unless => '/bin/grep -q "^Name.*=Keyboard" /etc/skel/Desktop/florence.desktop',
+		require => File['/etc/skel/Desktop/florence.desktop'],
 	}
 
 	file { '/etc/skel/Desktop/pcmanfm.desktop':
@@ -134,6 +137,7 @@ class desktop {
 	exec { 'fix-desktop-pcmanfm':
 		command => '/bin/sed -i "/^Name/ s/=.*/=Filemanager/;" /etc/skel/Desktop/pcmanfm.desktop',
 		unless => '/bin/grep -q "^Name.*=Filemanager" /etc/skel/Desktop/pcmanfm.desktop',
+		pequire => File['/etc/skel/Desktop/pcmanfm.desktop'],
 	}
 
 	file { '/etc/skel/Desktop/iceweasel.desktop':
@@ -148,6 +152,7 @@ class desktop {
 	exec { 'fix-desktop-iceweasel':
 		command => '/bin/sed -i "/^Name/ s/=.*/=Webbrowser/;" /etc/skel/Desktop/iceweasel.desktop',
 		unless => '/bin/grep -q "^Name.*=Webbrowser" /etc/skel/Desktop/iceweasel.desktop',
+		require => File['/etc/skel/Desktop/iceweasel.desktop'],
 	}