flake: fix devShell on i686-linux by disabling ClangBuildAnalyzer on it

ClangBuildAnalyzer doesn't build on i686-linux due to
`long long int`/`size_t` conversion errors, so let's just exclude it
from the devshell on that platform

Change-Id: If1077a7b3860db4381999c8e304f6d4b2bc96a05

flake.nix

@@ -408,9 +408,10 @@
                       pkgs.buildPackages.meson
                       pkgs.buildPackages.ninja
                       pkgs.buildPackages.cmake
-
-                      pkgs.buildPackages.clangbuildanalyzer
-                    ];
+                    ]
+                    ++
+                      lib.optionals (lib.meta.availableOn pkgs.stdenv.hostPlatform pkgs.buildPackages.clangbuildanalyzer)
+                        [ pkgs.buildPackages.clangbuildanalyzer ];
 
                   src = null;
 

misc/clangbuildanalyzer.nix

@@ -25,6 +25,9 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with lib.maintainers; [ lf- ];
     license = lib.licenses.unlicense;
     platforms = lib.platforms.unix;
+    # `long long int` != `size_t`
+    # There's no convenient lib.platforms.32bit or anything, but it's easy enough to do ourselves.
+    badPlatforms = lib.filter (plat: (lib.systems.elaborate plat).is32bit) lib.platforms.all;
     mainProgram = "ClangBuildAnalyzer";
   };
 })