agda: rework builder

pkgs/development/libraries/agda/agda-prelude/default.nix

@@ -1,16 +1,16 @@
-{ stdenv, agda, fetchgit }:
+{ stdenv, mkDerivation, fetchFromGitHub }:
 
-agda.mkDerivation (self: rec {
+mkDerivation rec {
   version = "eacc961c2c312b7443109a7872f99d55557df317";
-  name = "agda-prelude-${version}";
+  pname = "agda-prelude";
 
-  src = fetchgit {
-    url = "https://github.com/UlfNorell/agda-prelude.git";
+  src = fetchFromGitHub {
+    owner = "UlfNorell";
+    repo = "agda-prelude";
     rev = version;
     sha256 = "0iql67hb1q0fn8dwkcx07brkdkxqfqrsbwjy71ndir0k7qzw7qv2";
   };
 
-  topSourceDirectories = [ "src" ];
   everythingFile = "src/Prelude.agda";
 
   meta = with stdenv.lib; {
@@ -18,6 +18,6 @@ agda.mkDerivation (self: rec {
     description = "Programming library for Agda";
     license = stdenv.lib.licenses.mit;
     platforms = stdenv.lib.platforms.unix;
-    maintainers = with maintainers; [ mudri ];
+    maintainers = with maintainers; [ mudri alexarice ];
   };
-})
+}