diff --git a/nix/build.nix b/nix/build.nix
index 32178a23..f003c8d5 100644
--- a/nix/build.nix
+++ b/nix/build.nix
@@ -34,24 +34,6 @@ beamPackages.mixRelease {
       && baseName != ".nix-services-started";
   };
 
-  # Filter function to include necessary files and directories
-  # but exclude build artifacts
-  postUnpack = ''
-    # Remove build artifacts and temp directories from source
-    find $sourceRoot -type d \( \
-      -name "_build" -o \
-      -name "deps" -o \
-      -name ".elixir_ls" -o \
-      -name ".elixir-tools" -o \
-      -name "node_modules" -o \
-      -name "cover" -o \
-      -name ".git" \
-    \) -exec rm -rf {} + 2>/dev/null || true
-
-    # Remove dotfiles that shouldn't be in the build
-    find $sourceRoot -maxdepth 1 -type f -name ".*" ! -name ".formatter.exs" ! -name ".credo.exs" -delete 2>/dev/null || true
-  '';
-
   # Mix environment
   mixEnv = "prod";