diff --git a/pkgs/development/libraries/java/smack/builder.sh b/pkgs/development/libraries/java/smack/builder.sh
deleted file mode 100644
index c97259e6a17e..000000000000
--- a/pkgs/development/libraries/java/smack/builder.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-source $stdenv/setup
-
-mkdir smack
-cd smack
-tar xfvz $src
-mkdir -p $out/share/java
-cp libs/smack-*.jar $out/share/java
diff --git a/pkgs/development/libraries/java/smack/default.nix b/pkgs/development/libraries/java/smack/default.nix
index f831bfc8b933..c5d6098a3cde 100644
--- a/pkgs/development/libraries/java/smack/default.nix
+++ b/pkgs/development/libraries/java/smack/default.nix
@@ -2,13 +2,23 @@
 
 stdenv.mkDerivation {
   name = "smack-4.1.9";
-  builder = ./builder.sh;
 
   src = fetchurl {
     url = "http://www.igniterealtime.org/downloadServlet?filename=smack/smack_4_1_9.tar.gz";
     sha256 = "009x0qcxd4dkvwcjz2nla470pwbabwvg37wc21pslpw42ldi0bzp";
   };
 
+  sourceRoot = ".";
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/share/java
+    cp libs/smack-*.jar $out/share/java
+
+    runHook postInstall
+  '';
+
   meta = {
     description = "A XMPP (Jabber) client library for instant messaging and presence";
     homepage = "http://www.igniterealtime.org/projects/smack/";