Replace 'with plaforms; platform' with 'platforms.platform'

pkgs/tools/compression/lz4/default.nix

@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
     '';
     homepage = https://code.google.com/p/lz4/;
     license = with licenses; [ bsd2 gpl2Plus ];
-    platforms = with platforms; linux;
+    platforms = platforms.linux;
     maintainers = with maintainers; [ nckx ];
   };
 }

pkgs/tools/compression/pbzip2/default.nix

@@ -21,6 +21,6 @@ stdenv.mkDerivation rec {
     description = "A parallel implementation of bzip2 for multi-core machines";
     license = licenses.bsd2;
     maintainers = with maintainers; [viric];
-    platforms = with platforms; linux;
+    platforms = platforms.linux;
   };
 }

pkgs/tools/compression/xdelta/default.nix

@@ -38,7 +38,7 @@ stdenv.mkDerivation {
     description = "Binary differential compression in VCDIFF (RFC 3284) format";
     homepage = http://xdelta.org/;
     license = licenses.gpl2Plus;
-    platforms = with platforms; linux;
+    platforms = platforms.linux;
     maintainers = with maintainers; [ nckx ];
   };
 }