Re-Revert "Merge #101508: libraw: 0.20.0 -> 0.20.2"

This reverts commit c778945806.

I believe this is exactly what brings the staging branch into
the right shape after the last merge from master (through staging-next);
otherwise part of staging changes would be lost
(due to being already reachable from master but reverted).

pkgs/development/libraries/boost/generic.nix

@@ -146,11 +146,11 @@ stdenv.mkDerivation {
 
   enableParallelBuilding = true;
 
-  nativeBuildInputs = [ which ];
+  nativeBuildInputs = [ which ]
+    ++ optional stdenv.hostPlatform.isDarwin fixDarwinDylibNames;
   depsBuildBuild = [ buildPackages.stdenv.cc ];
   buildInputs = [ expat zlib bzip2 libiconv ]
     ++ optional (stdenv.hostPlatform == stdenv.buildPlatform) icu
-    ++ optional stdenv.isDarwin fixDarwinDylibNames
     ++ optional enablePython python
     ++ optional enableNumpy python.pkgs.numpy;