fix(flake.nix): include dev buildInputs in dogfood nix image (#16325)

flake.nix

@@ -85,7 +85,7 @@
           drpc.defaultPackage.${system}
           formatter
           fzf
-          gcc
+          gcc13
           gdk
           getopt
           gh
@@ -174,7 +174,7 @@
             name = "coder-${osArch}";
             # Updated with ./scripts/update-flake.sh`.
             # This should be updated whenever go.mod changes!
-            vendorHash = "sha256-hJBNmHz9ZJLS/QTu8w8y1w/Yi45aSoaSeZ//ysllp6c=";
+            vendorHash = "sha256-QjqF+QZ5JKMnqkpNh6ZjrJU2QcSqiT4Dip1KoicwLYc=";
             proxyVendor = true;
             src = ./.;
             nativeBuildInputs = with pkgs; [
@@ -212,10 +212,9 @@
         devShells = {
           default = pkgs.mkShell {
             buildInputs = devShellPackages;
-            shellHook = ''
-              export PLAYWRIGHT_BROWSERS_PATH=${pkgs.playwright-driver.browsers}
-              export PLAYWRIGHT_SKIP_VALIDATE_HOST_REQUIREMENTS=true
-            '';
+
+            PLAYWRIGHT_BROWSERS_PATH = pkgs.playwright-driver.browsers;
+            PLAYWRIGHT_SKIP_VALIDATE_HOST_REQUIREMENTS = true;
 
             LOCALE_ARCHIVE =
               with pkgs;
@@ -239,21 +238,29 @@
             aarch64-windows = buildFat "windows_arm64.exe";
           }
           // (pkgs.lib.optionalAttrs pkgs.stdenv.isLinux {
-            dev_image = docker.buildNixShellImage {
+            dev_image = docker.buildNixShellImage rec {
               name = "codercom/oss-dogfood-nix";
               tag = "latest-${system}";
 
+              # (ThomasK33): Workaround for images with too many layers (>64 layers) causing sysbox
+              # to have issues on dogfood envs.
               maxLayers = 32;
 
+              uname = "coder";
+              homeDirectory = "/home/${uname}";
+
               drv = devShells.default.overrideAttrs (oldAttrs: {
-                # (ThomasK33): Workaround for images with too many layers (>64 layers) causing sysbox
-                # to have issues on dogfood envs.
                 buildInputs =
-                  oldAttrs.buildInputs
-                  ++ (with pkgs; [
-                    nix
+                  (with pkgs; [
+                    busybox
                     coreutils
-                  ]);
+                    nix
+                    curl.bin # Ensure the actual curl binary is included in the PATH
+                    glibc.bin # Ensure the glibc binaries are included in the PATH
+                    binutils # ld and strings
+                    filebrowser # Ensure that we're not redownloading filebrowser on each launch
+                  ])
+                  ++ oldAttrs.buildInputs;
               });
             };
           });