treewide: Make explicit that 'dev' output of boost is used

Also fix one incorrect output in geant.

pkgs/development/python-modules/pycuda/default.nix

@@ -30,7 +30,7 @@ buildPythonPackage rec {
   }; 
 
   preConfigure = ''
-    findInputs ${boost} boost_dirs propagated-native-build-inputs
+    findInputs ${boost.dev} boost_dirs propagated-native-build-inputs
 
     export BOOST_INCLUDEDIR=$(echo $boost_dirs | sed -e s/\ /\\n/g - | grep '\-dev')/include
     export BOOST_LIBRARYDIR=$(echo $boost_dirs | sed -e s/\ /\\n/g - | grep -v '\-dev')/lib