diff --git a/pkgs/applications/networking/instant-messengers/psi/0.11.nix b/pkgs/applications/networking/instant-messengers/psi/0.11.nix
index 5cd1ef1c43fa..2f9d9e3b3b72 100644
--- a/pkgs/applications/networking/instant-messengers/psi/0.11.nix
+++ b/pkgs/applications/networking/instant-messengers/psi/0.11.nix
@@ -1,30 +1,20 @@
+args : with args; 
+rec {
+  src = fetchurl {
+    url = ftp://ftp.ru.debian.org/debian/pool/main/p/psi/psi_0.11.orig.tar.gz;
+    sha256 = "1rgjahngari4pwhi0zz9mricaaqxkk8ry8w6s1vgsq3zwa2l5x57";
+  };
 
-args : with args; with builderDefs {src="";} null;
-	let localDefs = builderDefs (rec {
-		src = /* put a fetchurl here */
-		fetchurl {
-			url = ftp://ftp.ru.debian.org/debian/pool/main/p/psi/psi_0.11.orig.tar.gz;
-			sha256 = "1rgjahngari4pwhi0zz9mricaaqxkk8ry8w6s1vgsq3zwa2l5x57";
-		};
+  buildInputs = [aspell qt zlib sox openssl libX11 xproto 
+    libSM libICE];
+  configureFlags = [" --with-zlib-inc=${zlib}/include "
+    " --with-openssl-inc=${openssl}/include "
+  ];
 
-		buildInputs = [aspell qt zlib sox openssl libX11 xproto 
-			libSM libICE];
-		configureFlags = [" --with-zlib-inc=${zlib}/include "
-			" --with-openssl-inc=${openssl}/include "
-		];
-	}) args null; /* null is a terminator for sumArgs */
-	in with localDefs;
-stdenv.mkDerivation rec {
-	name = "psi-"+version;
-	MAKE="make";
-	builder = writeScript (name + "-builder")
-		(textClosure localDefs 
-			["doConfigure" "doMakeInstall" doForceShare doPropagate]);
-	meta = {
-		description = "
-		Psi, an XMPP (Jabber) client.
-";
-		inherit src;
-	};
+  phaseNames = ["doConfigure" "doMakeInstall"];
+      
+  name = "psi-" + version;
+  meta = {
+    description = "Psi, an XMPP (Jabber) client";
+  };
 }
-
diff --git a/pkgs/misc/tex/texlive/default.nix b/pkgs/misc/tex/texlive/default.nix
index 9d984d09eec1..bc2443acbee3 100644
--- a/pkgs/misc/tex/texlive/default.nix
+++ b/pkgs/misc/tex/texlive/default.nix
@@ -1,73 +1,79 @@
-args : with args; with builderDefs {src="";} null;
-	let localDefs = builderDefs (rec {
-		src = /* put a fetchurl here */
-		fetchurl {
-			url = debian://pool/main/t/texlive-bin/texlive-bin_2007.orig.tar.gz;
-			sha256 = "1fz5lqbigdrdg0pmaynissd7wn59p2yj9f203nl93dcpffrapxjv";
-		};
-		texmfSrc = 
-		fetchurl {
-			url = debian://pool/main/t/texlive-base/texlive-base_2007.orig.tar.gz;
-			sha256 = "16a4dyliidk43qj0m4gpsl9ln7nqsdcdx1lkbk4wrm03xpx87zvh";
-		};
+args : with args; 
+rec {
+  src = fetchurl { 
+    url = mirror://debian/pool/main/t/texlive-bin/texlive-bin_2007.orig.tar.gz;
+    sha256 = "1fz5lqbigdrdg0pmaynissd7wn59p2yj9f203nl93dcpffrapxjv";
+  };
+  
+  texmfSrc = fetchurl { 
+    url = mirror://debian/pool/main/t/texlive-base/texlive-base_2007.orig.tar.gz;
+    sha256 = "16a4dyliidk43qj0m4gpsl9ln7nqsdcdx1lkbk4wrm03xpx87zvh";
+  };
 
-		setupHook = ./setup-hook.sh;
+  langTexmfSrc = fetchurl {
+    url = mirror://debian/pool/main/t/texlive-lang/texlive-lang_2007.orig.tar.gz;
+    sha256 = "0cmd9ryd57rzzg7g2gm3qn4ijakkacy810h5zncqd39p3i1yn6nx";
+  };
+  
+  setupHook = ./setup-hook.sh;
 
-		doInstall = FullDepEntry (''
-			ensureDir $out
-			ensureDir $out/nix-support 
-			cp ${setupHook} $out/nix-support/setup-hook.sh
-			ensureDir $out/share
-			tar xf ${texmfSrc} -C $out/share --strip-components=1
-			cd build/source
-			sed -e s@/usr/bin/@@g -i $(grep /usr/bin/ -rl . )
-			sed -e '/ubidi_open/i#include <unicode/urename.h>' -i $(find . -name configure)
-			sed -e s@ncurses/curses.h@curses.h@g -i $(grep ncurses/curses.h -rl . ) 
-			NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${freetype}/include/freetype2"
-			echo NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${icu}/include/unicode"
-			NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${icu}/include/layout";
-			./configure --prefix=$out \
-				--with-x11 \
-				--with-system-zlib \
-				--with-system-freetype2 \
-				--with-system-t1lib \
-				--with-system-pnglib \
-				--with-system-gd \
-				--with-system-icu \
-				--with-system-ncurses \
-				--enable-ipc \
-				--with-mktexfmt
-			make 
-			make install
-			mv $out/bin $out/libexec
-			ensureDir $out/bin
-			for i in $out/libexec/*/*; do
-				echo -ne "#! /bin/sh\\n$i \"\$@\"" >$out/bin/$(basename $i)
-				chmod a+x $out/bin/$(basename $i)
-			done
-			texmf_var=$(mktemp -d /var/tmp/texmf-varXXXXXXXX)
-			mv $out/share/texmf-var/* $texmf_var/ 			
-			chmod -R a+rwX $texmf_var
-			ln -s $texmf_var $out/share/texmf-var
-			ln -s $out/share/texmf $out/share/texmf-config
-		'') ["minInit" "defEnsureDir" "doUnpack" "addInputs"];
-		buildInputs = [zlib bzip2 ncurses libpng ed flex bison libX11 xproto 
-			freetype t1lib gd libXaw icu ghostscript 
-			libXt libXpm libXmu libXext xextproto perl libSM 
-			libICE];
-		configureFlags = [];
-	}) args null; /* null is a terminator for sumArgs */
-	in with localDefs;
-stdenv.mkDerivation rec {
-	name = "TeXLive-core-2007";
-	builder = writeScript (name + "-builder")
-		(textClosure localDefs 
-			[doInstall doForceShare doPropagate]);
-	meta = {
-		description = "
-		TeX distribution.
-";
-		inherit src;
-		srcs = [texmfSrc];
-	};
+  doPreConfigure = FullDepEntry (''
+    ensureDir $out
+    ensureDir $out/nix-support 
+    cp ${setupHook} $out/nix-support/setup-hook.sh
+    ensureDir $out/share
+    tar xf ${texmfSrc} -C $out/share --strip-components=1
+    tar xf ${langTexmfSrc} -C $out/share --strip-components=1
+    cp -r texmf* $out/share
+    cd build/source
+    sed -e s@/usr/bin/@@g -i $(grep /usr/bin/ -rl . )
+    sed -e '/ubidi_open/i#include <unicode/urename.h>' -i $(find . -name configure)
+    sed -e s@ncurses/curses.h@curses.h@g -i $(grep ncurses/curses.h -rl . ) 
+    sed -e 's/.*pyhyph.*/=&/' -i $out/share/texmf-config/tex/generic/config/language.dat
+
+    updmap --syncwithtrees
+
+    NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${freetype}/include/freetype2"
+    NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${icu}/include/layout";
+  '') ["minInit" "doUnpack" "addInputs" "defEnsureDir"];
+
+  doPostInstall = FullDepEntry(''
+    mv $out/bin $out/libexec
+    ensureDir $out/bin
+    for i in $out/libexec/*/*; do
+        echo -ne "#! /bin/sh\\n$i \"\$@\"" >$out/bin/$(basename $i)
+        chmod a+x $out/bin/$(basename $i)
+    done
+    texmf_var=$(mktemp -d /var/tmp/texmf-varXXXXXXXX)
+    mv $out/share/texmf-var/* $texmf_var/ 
+    chmod -R a+rwX $texmf_var
+    rm -r $out/share/texmf-var
+    rm -r /var/tmp/texmf-var
+    ln -sfT $texmf_var $out/share/texmf-var
+    ln -sfT $texmf_var /var/tmp/texmf-var
+    ln -s $out/share/texmf $out/share/texmf-config
+    PATH=$PATH:$out/bin mktexlsr $out/share/texmf*
+ '') ["minInit" "defEnsureDir" "doUnpack" "doMakeInstall"];
+
+  buildInputs = [
+    zlib bzip2 ncurses libpng flex bison libX11 libICE
+    xproto freetype t1lib gd libXaw icu ghostscript ed 
+    libXt libXpm libXmu libXext xextproto perl libSM 
+  ];
+
+  configureFlags = [ "--with-x11" "--with-system-zlib" 
+    "--with-system-freetype2" "--with-system-t1lib" 
+    "--with-system-pnglib" "--with-system-gd" 
+    "--with-system-icu" "--with-system-ncurses" 
+    "--enable-ipc" "--with-mktexfmt"
+  ];
+
+  phaseNames = ["doPreConfigure" "doConfigure" 
+    "doMakeInstall" "doPostInstall"];
+
+  name = "texlive-core-2007";
+  meta = {
+    description = "A TeX distribution";
+    srcs = [texmfSrc langTexmfSrc];
+  };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 1798a03de1b2..d98cb46490d5 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -270,6 +270,9 @@ let pkgs = rec {
     inherit stringsWithDeps lib stdenv writeScript fetchurl;
   };
 
+  builderDefsPackage = expr: lib.sumArgs 
+    (((builderDefs null).builderDefsPackage builderDefs) expr);
+
   stringsWithDeps = import ../lib/strings-with-deps.nix {
     inherit stdenv lib;
   };
@@ -6076,11 +6079,13 @@ let pkgs = rec {
     inherit fetchurl stdenv tetex lazylist;
   };
 
-  psiFun = lib.sumArgs (selectVersion ../applications/networking/instant-messengers/psi "0.11") {
-    inherit builderDefs zlib aspell sox openssl;
-    inherit (xlibs) xproto libX11 libSM libICE;
-    qt = qt4;
-  };
+  psiFun = builderDefsPackage 
+    (selectVersion ../applications/networking/instant-messengers/psi "0.11") 
+    {
+      inherit builderDefs zlib aspell sox openssl;
+      inherit (xlibs) xproto libX11 libSM libICE;
+      qt = qt4;
+    };
 
   psi = psiFun null;
 
@@ -6146,7 +6151,7 @@ let pkgs = rec {
     inherit stdenv perl tetex graphviz ghostscript;
   };
 
-  texLiveFun = lib.sumArgs (import ../misc/tex/texlive) {
+  texLiveFun = builderDefsPackage (import ../misc/tex/texlive) {
     inherit builderDefs zlib bzip2 ncurses libpng ed
       gd t1lib freetype icu perl;
     inherit (xlibs) libXaw libX11 xproto libXt libXpm
diff --git a/pkgs/top-level/builder-defs.nix b/pkgs/top-level/builder-defs.nix
index d06ebb941032..cd86ba67f384 100644
--- a/pkgs/top-level/builder-defs.nix
+++ b/pkgs/top-level/builder-defs.nix
@@ -3,6 +3,8 @@ args: with args; with stringsWithDeps; with lib;
 {
 	inherit writeScript; 
 
+	src = getAttr ["src"] "" args;
+
 	addSbinPath = getAttr ["addSbinPath"] false args;
 
 	forceShare = if args ? forceShare then args.forceShare else ["man" "doc" "info"];
@@ -385,4 +387,18 @@ args: with args; with stringsWithDeps; with lib;
           GHC_PACKAGE_PATH=\$PACKAGE_DB ./register.sh
         " ["defCreateEmptyPackageDatabaseAndSetupHook" "defCabalSetupCmd"];
 
+	phaseNames = args.phaseNames ++ 
+	  ["doForceShare" "doPropagate"];
+
+	builderDefsPackage = bd: func: args: (
+	let localDefs = bd (func ((bd null) // args)) args null; in
+
+	stdenv.mkDerivation (rec {
+	  inherit (localDefs) name;
+	  builder = writeScript (name + "-builder")
+	    (textClosure localDefs localDefs.phaseNames);
+	  meta = localDefs.meta // {inherit src;};
+	})
+	);
+
 }) // args
diff --git a/pkgs/top-level/template-composing+config.nix b/pkgs/top-level/template-composing+config.nix
index 56d5e1fa4837..7f7e55302dda 100644
--- a/pkgs/top-level/template-composing+config.nix
+++ b/pkgs/top-level/template-composing+config.nix
@@ -16,9 +16,7 @@ stdenv.mkDerivation rec {
 	builder = writeScript (name + "-builder")
 		(textClosure localDefs [(abort "Check phases") doMakeInstall doForceShare doPropagate]);
 	meta = {
-		description = "
-	${(abort "Specify description")}
-";
+		description = "${(abort "Specify description")}";
 		inherit src;
 	};
 }
diff --git a/pkgs/top-level/template-composing-builder.nix b/pkgs/top-level/template-composing-builder.nix
index 965bc082aba9..7725d7986fd1 100644
--- a/pkgs/top-level/template-composing-builder.nix
+++ b/pkgs/top-level/template-composing-builder.nix
@@ -1,4 +1,4 @@
-args : with args; with builderDefs {src="";} null;
+args : with args; with builderDefs null;
 	let localDefs = builderDefs (rec {
 		src = /* put a fetchurl here */
 
@@ -12,9 +12,7 @@ stdenv.mkDerivation rec {
 		(textClosure localDefs 
 			[(abort "Specify phases - defined here or in builderDefs") doForceShare doPropagate]);
 	meta = {
-		description = "
-		${abort "Write a description"}
-";
+		description = "${abort "Write a description"}";
 		inherit src;
 	};
 }