diff --git a/pkgs/tools/networking/socat/1.6.0.0.nix b/pkgs/tools/networking/socat/1.6.0.0.nix
index 0ec1ac9893b..8840d134773 100644
--- a/pkgs/tools/networking/socat/1.6.0.0.nix
+++ b/pkgs/tools/networking/socat/1.6.0.0.nix
@@ -1,35 +1,25 @@
-args : with args; with builderDefs {src="";} null;
-    let localDefs = builderDefs (rec {
-        src = /* put a fetchurl here */
-        fetchurl {
-            url = http://www.dest-unreach.org/socat/download/socat-1.6.0.0.tar.bz2;
-            sha256 = "1j01iazwfr63q71cfcfzrdz8digqlg3ldhlbb72yl5mn9awr0w0m";
-        };
-        patches = [
-          (fetchurl {
-              url = http://www.dest-unreach.org/socat/contrib/socat-servicenames.patch;
-              sha256 = "1r8zd6mk257n01i34i5syxl2k6fr35nlr7bqs9sfc79irjl62z66";
-          })
-          (fetchurl {
-              url = http://www.dest-unreach.org/socat/contrib/socat-maxfds.patch.gz;
-              sha256 = "0fsn0k0qsrdbjbhj09a6kxfsxb7yhxs4cad26znd9naginsj7pxa";
-          })
-        ];
-        buildInputs = [openssl];
-        configureFlags = [];
-    }) null; /* null is a terminator for sumArgs */
-    in with localDefs;
-stdenv.mkDerivation rec {
-    name = "socat-"+version;
-    builder = writeScript (name + "-builder")
-        (textClosure localDefs 
-            [doPatch doConfigure doMakeInstall doForceShare doPropagate]);
-    meta = {
-        description = "
+args : with args; 
+rec {
+  src = /* Here a fetchurl expression goes */
+  fetchurl {
+    url = http://www.dest-unreach.org/socat/download/socat-1.6.0.1.tar.bz2;
+    sha256 = "1cl7kf0rnbvjxz8vdkmdh1crd069qmz1jjw40r8bydgpn0nsh6qd";
+  };
+
+  buildInputs = [openssl];
+  configureFlags = [];
+
+  /* doConfigure should be specified separately */
+  phaseNames = ["doPatch" "doConfigure" "doMakeInstall"];
+      
+  name = "socat-" + version;
+  meta = {
+    description = "Socat - a different replacement for netcat";
+    longDesc = "
         Socat, one more analogue of netcat, but not mimicking it.
 	'netcat++' (extended design, new implementation)
 ";
         homepage = "http://www.dest-unreach.org/socat/";
-	inherit src;
-    };
+	srcs = patches;
+  };
 }
diff --git a/pkgs/tools/networking/socat/2.0.0-b1.nix b/pkgs/tools/networking/socat/2.0.0-b1.nix
index b4c712ea9a3..4e4b626e8c3 100644
--- a/pkgs/tools/networking/socat/2.0.0-b1.nix
+++ b/pkgs/tools/networking/socat/2.0.0-b1.nix
@@ -1,26 +1,25 @@
-args : with args; with builderDefs {src="";} null;
-    let localDefs = builderDefs (rec {
-        src = /* put a fetchurl here */
+args : with args; 
+rec {
+  src = /* Here a fetchurl expression goes */
         fetchurl {
             url = http://www.dest-unreach.org/socat/download/socat-2.0.0-b1.tar.bz2;
             sha256 = "0ybd5fw22icl10r33k987rskh9gvysm1jph90a1pfdjj57cy44fk";
         };
-        
-        buildInputs = [openssl];
-        configureFlags = [];
-    }) null; /* null is a terminator for sumArgs */
-    in with localDefs;
-stdenv.mkDerivation rec {
-    name = "socat-"+version;
-    builder = writeScript (name + "-builder")
-        (textClosure localDefs 
-            [doPatch doConfigure doMakeInstall doForceShare doPropagate]);
-    meta = {
-        description = "
+
+  buildInputs = [openssl];
+  configureFlags = [];
+
+  /* doConfigure should be specified separately */
+  phaseNames = ["doPatch" "doConfigure" "doMakeInstall"];
+      
+  name = "socat-" + version;
+  meta = {
+    description = "Socat - a different replacement for netcat";
+    longDesc = "
         Socat, one more analogue of netcat, but not mimicking it.
 	'netcat++' (extended design, new implementation)
 ";
         homepage = "http://www.dest-unreach.org/socat/";
-        inherit src;
-    };
+	srcs = patches;
+  };
 }