diff --git a/pkgs/desktops/kde-4.5/base/default.nix b/pkgs/desktops/kde-4.5/base/default.nix
index a6603ae6dbbf..02c38bacedef 100644
--- a/pkgs/desktops/kde-4.5/base/default.nix
+++ b/pkgs/desktops/kde-4.5/base/default.nix
@@ -4,7 +4,6 @@
 kdePackage {
   pn = "kdebase";
   v = "4.5.0";
-  sha256 = "1znmmx84hx3a31lhr55j3h91p9r6fv1c4q9hbgv4xwaijlkxk6dw";
 
   preConfigure = "cd apps";
 
diff --git a/pkgs/desktops/kde-4.5/bindings/default.nix b/pkgs/desktops/kde-4.5/bindings/default.nix
index eae386030d39..2628d115cd46 100644
--- a/pkgs/desktops/kde-4.5/bindings/default.nix
+++ b/pkgs/desktops/kde-4.5/bindings/default.nix
@@ -8,7 +8,6 @@
 kdePackage rec {
   pn = "kdebindings";
   v = "4.5.0";
-  sha256 = "0x8c98gbp2rm3dckzw3l0jh2ch5g9sb2prmilwzl8d5psyhx39n6";
 
   patches = [ ./python-site-packages-install-dir.diff ];
 
diff --git a/pkgs/desktops/kde-4.5/kde-package/default.nix b/pkgs/desktops/kde-4.5/kde-package/default.nix
index 6f41ed7daa61..9e1ef5006fd2 100644
--- a/pkgs/desktops/kde-4.5/kde-package/default.nix
+++ b/pkgs/desktops/kde-4.5/kde-package/default.nix
@@ -1,12 +1,16 @@
 { stdenv, fetchurl }:
 
-a@{ pn, v, stable ? true, sha256, subdir ? null, ... }:
+let
+  manifest = import ./manifest.nix;
+in
+
+a@{ pn, v, stable ? true, subdir ? null, ... }:
 stdenv.mkDerivation ({
   name = "${pn}-${v}";
   src = fetchurl {
     url = "mirror://kde/" + (if stable then "" else "un") + "stable/" +
       (if subdir == null then "${v}/src" else subdir) + "/${pn}-${v}.tar.bz2";
-    inherit sha256;
+    sha256 = builtins.getAttr "${pn}-${v}.tar.bz2" manifest;
   };
   meta = {
     maintainers = with stdenv.lib.maintainers; [ sander urkud ];
@@ -14,4 +18,4 @@ stdenv.mkDerivation ({
     inherit stable;
     homepage = http://www.kde.org;
   } // ( if a ? meta then a.meta else { } );
-} // (removeAttrs a [ "meta" "pn" "v" "stable" "sha256" "subdir" ]))
+} // (removeAttrs a [ "meta" "pn" "v" "stable" "subdir" ]))
diff --git a/pkgs/desktops/kde-4.5/libs/default.nix b/pkgs/desktops/kde-4.5/libs/default.nix
index 71daed339cd1..c749223535bf 100644
--- a/pkgs/desktops/kde-4.5/libs/default.nix
+++ b/pkgs/desktops/kde-4.5/libs/default.nix
@@ -8,7 +8,6 @@
 kdePackage {
   pn = "kdelibs";
   v = "4.5.0";
-  sha256 = "0d3iml2v1vp1y6i5vpqv77nbdlw6qb8j6c88yi744ba4zvcirzrx";
 
   buildInputs = [
     cmake perl qt4 xz flex bison bzip2 pcre fam libxml2 libxslt
diff --git a/pkgs/desktops/kde-4.5/pimlibs/default.nix b/pkgs/desktops/kde-4.5/pimlibs/default.nix
index 8452161b66c3..b548ad66ecda 100644
--- a/pkgs/desktops/kde-4.5/pimlibs/default.nix
+++ b/pkgs/desktops/kde-4.5/pimlibs/default.nix
@@ -4,7 +4,6 @@
 kdePackage {
   pn = "kdepimlibs";
   v = "4.5.0";
-  sha256 = "0n3wmc2c4jcxbi81i9jmw23b5ms43gia58qpr835im874641f54m";
 
   buildInputs = [ cmake qt4 perl boost cyrus_sasl gpgme libical openldap
     shared_mime_info kdelibs automoc4 akonadi soprano ];
diff --git a/pkgs/desktops/kde-4.5/support/oxygen-icons/default.nix b/pkgs/desktops/kde-4.5/support/oxygen-icons/default.nix
index b701e61ba03c..ffd7fb819e8b 100644
--- a/pkgs/desktops/kde-4.5/support/oxygen-icons/default.nix
+++ b/pkgs/desktops/kde-4.5/support/oxygen-icons/default.nix
@@ -3,7 +3,6 @@
 kdePackage {
   pn = "oxygen-icons";
   v = "4.5.0";
-  sha256 = "11wlrxnral4q5wi46p1di1cff4vr5da35a8dv2xx3ag6lnhqvjqi";
 
   outputHashAlgo = "sha256";
   outputHashMode = "recursive";
diff --git a/pkgs/desktops/kde-4.5/support/polkit-qt-1/default.nix b/pkgs/desktops/kde-4.5/support/polkit-qt-1/default.nix
index 03543a6d7e2f..6d0de5983133 100644
--- a/pkgs/desktops/kde-4.5/support/polkit-qt-1/default.nix
+++ b/pkgs/desktops/kde-4.5/support/polkit-qt-1/default.nix
@@ -4,7 +4,6 @@ kdePackage {
   pn = "polkit-qt-1";
   v = "0.96.1";
   subdir = "apps/KDE4.x/admin";
-  sha256 = "1ng5bi1gmr5lg49c5kyqyjzbjhs4w90c2zlnfcyviv9p3wzfgzbr";
 
   buildInputs = [ cmake qt4 automoc4 ];
   propagatedBuildInputs = [ polkit glib ];