libnfc: specify license

- update description
- update style

pkgs/development/libraries/libnfc/default.nix

@@ -1,4 +1,11 @@
-{ lib, stdenv, fetchFromGitHub, libusb-compat-0_1, readline, cmake, pkg-config }:
+{ lib
+, stdenv
+, fetchFromGitHub
+, libusb-compat-0_1
+, readline
+, cmake
+, pkg-config
+}:
 
 stdenv.mkDerivation rec {
   pname = "libnfc";
@@ -11,16 +18,29 @@ stdenv.mkDerivation rec {
     sha256 = "5gMv/HajPrUL/vkegEqHgN2d6Yzf01dTMrx4l34KMrQ=";
   };
 
-  nativeBuildInputs = [ cmake pkg-config ];
-  buildInputs = [ libusb-compat-0_1 readline ];
+  nativeBuildInputs = [
+    cmake
+    pkg-config
+  ];
 
-  configureFlags = [ "sysconfdir=/etc" ];
-  cmakeFlags = lib.optionals stdenv.isDarwin [ "-DLIBNFC_DRIVER_PN532_I2C=OFF" "-DLIBNFC_DRIVER_PN532_SPI=OFF" ];
+  buildInputs = [
+    libusb-compat-0_1
+    readline
+  ];
+
+  configureFlags = [
+    "sysconfdir=/etc"
+  ];
+
+  cmakeFlags = lib.optionals stdenv.isDarwin [
+    "-DLIBNFC_DRIVER_PN532_I2C=OFF"
+    "-DLIBNFC_DRIVER_PN532_SPI=OFF"
+  ];
 
   meta = with lib; {
-    description = "Open source library libnfc for Near Field Communication";
-    license = licenses.gpl3;
+    description = "Library for Near Field Communication (NFC)";
     homepage = "https://github.com/nfc-tools/libnfc";
+    license = licenses.lgpl3Plus;
     maintainers = with maintainers; [ offline ];
     platforms = platforms.unix;
   };