treewide: stdenv.lib -> lib

pkgs/misc/drivers/hplip/3.18.5.nix

@@ -76,7 +76,7 @@ python2Packages.buildPythonApplication {
     reportlab
     usbutils
     sip
-  ] ++ stdenv.lib.optionals withQt5 [
+  ] ++ lib.optionals withQt5 [
     pyqt5
   ];
 
@@ -108,9 +108,9 @@ python2Packages.buildPythonApplication {
       --with-systraydir=$out/xdg/autostart
       --with-mimedir=$out/etc/cups
       --enable-policykit
-      ${stdenv.lib.optionalString withStaticPPDInstall "--enable-cups-ppd-install"}
+      ${lib.optionalString withStaticPPDInstall "--enable-cups-ppd-install"}
       --disable-qt4
-      ${stdenv.lib.optionalString withQt5 "--enable-qt5"}
+      ${lib.optionalString withQt5 "--enable-qt5"}
     "
 
     export makeFlags="
@@ -136,7 +136,7 @@ python2Packages.buildPythonApplication {
   # Running `hp-diagnose_plugin -g` can be used to diagnose
   # issues with plugins.
   #
-  postInstall = stdenv.lib.optionalString withPlugin ''
+  postInstall = lib.optionalString withPlugin ''
     sh ${plugin} --noexec --keep
     cd plugin_tmp