libplctag: fix build

pkgs/by-name/li/libplctag/package.nix

@@ -5,27 +5,34 @@
   fetchFromGitHub,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "libplctag";
   version = "2.6.3";
 
   src = fetchFromGitHub {
     owner = "libplctag";
     repo = "libplctag";
-    rev = "v${version}";
-    sha256 = "sha256-HUog7Tlm4jiqYXk22dziumCA/68c35+OwnTNYu9mV5E=";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-HUog7Tlm4jiqYXk22dziumCA/68c35+OwnTNYu9mV5E=";
+  };
+
+  env = {
+    NIX_CFLAGS_COMPILE = toString [
+      "-Wno-error=implicit-function-declaration"
+      "-Wno-error=int-conversion"
+    ];
   };
 
   nativeBuildInputs = [ cmake ];
 
-  meta = with lib; {
+  meta = {
     homepage = "https://github.com/libplctag/libplctag";
     description = "Library that uses EtherNet/IP or Modbus TCP to read and write tags in PLCs";
-    license = with licenses; [
+    license = with lib.licenses; [
       lgpl2Plus
       mpl20
     ];
-    maintainers = with maintainers; [ petterstorvik ];
-    platforms = platforms.all;
+    maintainers = with lib.maintainers; [ petterstorvik ];
+    platforms = lib.platforms.all;
   };
-}
+})