diff --git a/nix/lib.nix b/nix/lib.nix
new file mode 100644
index 0000000..b0d8bb2
--- /dev/null
+++ b/nix/lib.nix
@@ -0,0 +1,88 @@
+# Builds the logos-storage-ui library
+{ pkgs, common, src, logosStorageModule, logosSdk }:
+
+pkgs.stdenv.mkDerivation {
+  pname = "${common.pname}-lib";
+  version = common.version;
+  
+  inherit src;
+  inherit (common) buildInputs cmakeFlags meta env;
+  
+  # Add logosSdk to nativeBuildInputs for logos-cpp-generator
+  nativeBuildInputs = common.nativeBuildInputs ++ [ logosSdk ];
+  
+  preConfigure = ''
+    runHook prePreConfigure
+    
+    # Create generated_code directory for generated files
+    mkdir -p ./generated_code
+    
+    # Copy include files from logos-storage-module result
+    echo "Copying include files from logos-storage-module..."
+    if [ -d "${logosStorageModule}/include" ]; then
+      echo "Found include directory in logos-storage-module"
+      cp -r "${logosStorageModule}/include"/* ./generated_code/
+      echo "Copied include files:"
+      ls -la ./generated_code/
+    else
+      echo "Warning: No include directory found in logos-storage-module"
+    fi
+    
+    # Run logos-cpp-generator with metadata.json and --general-only flag
+    echo "Running logos-cpp-generator..."
+    logos-cpp-generator --metadata ${src}/metadata.json --general-only --output-dir ./generated_code
+    
+    # Check what was generated by logos-cpp-generator
+    echo "Checking generated files in generated_code:"
+    ls -la ./generated_code/
+    
+    # Create include directory and move generated files there if they exist
+    if [ -f "./generated_code/core_manager_api.h" ] || [ -f "./generated_code/logos_sdk.h" ]; then
+      echo "Creating include directory and moving generated files..."
+      mkdir -p ./generated_code/include
+      # Move generated header files to include directory
+      for file in ./generated_code/*.h; do
+        if [ -f "$file" ]; then
+          mv "$file" ./generated_code/include/
+        fi
+      done
+      # Also copy generated .cpp files to include directory
+      for file in ./generated_code/*.cpp; do
+        if [ -f "$file" ]; then
+          cp "$file" ./generated_code/include/
+        fi
+      done
+      echo "Generated include directory:"
+      ls -la ./generated_code/include/
+    else
+      echo "Warning: No header files generated by logos-cpp-generator"
+    fi
+    
+    runHook postPreConfigure
+  '';
+  
+  installPhase = ''
+    runHook preInstall
+    
+    mkdir -p $out/lib
+    # Find and copy the built library file from the modules directory
+    if [ -f modules/storage_ui.dylib ]; then
+      cp modules/storage_ui.dylib $out/lib/
+    elif [ -f modules/storage_ui.so ]; then
+      cp modules/storage_ui.so $out/lib/
+    else
+      echo "Error: No library file found"
+      exit 1
+    fi
+    
+    # Also install the generated include files
+    if [ -d "./generated_code/include" ]; then
+      mkdir -p $out/include
+      cp -r ./generated_code/include/* $out/include/
+      echo "Installed generated include files:"
+      ls -la $out/include/
+    fi
+    
+    runHook postInstall
+  '';
+}
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