diff --git a/pkgs/development/compilers/gcc-4.5/default.nix b/pkgs/development/compilers/gcc-4.5/default.nix
index 0e0029f9f94d..a86c317e265d 100644
--- a/pkgs/development/compilers/gcc-4.5/default.nix
+++ b/pkgs/development/compilers/gcc-4.5/default.nix
@@ -220,11 +220,6 @@ stdenv.mkDerivation ({
     ++ (optionals langVhdl [gnat])
     ;
 
-  configureFlagsArray = stdenv.lib.optionals
-    (ppl != null && ppl.dontDisableStatic == true)
-        [ "--with-host-libstdcxx=-lstdc++ -lgcc_s"
-            "--with-stage1-libs=-lstdc++ -lgcc_s" ];
-
   configureFlags = "
     ${if enableMultilib then "" else "--disable-multilib"}
     ${if enableShared then "" else "--disable-shared"}
diff --git a/pkgs/development/libraries/cloog-ppl/default.nix b/pkgs/development/libraries/cloog-ppl/default.nix
index d0e4083788ba..d9dae7bfd41f 100644
--- a/pkgs/development/libraries/cloog-ppl/default.nix
+++ b/pkgs/development/libraries/cloog-ppl/default.nix
@@ -1,15 +1,4 @@
-{ fetchurl, stdenv, ppl, static ? false }:
-
-let
-
-  # --with-host-libstdcxx helps when *ppl* is built statically.
-  # But I will suppose that this is statically built only when ppl is also
-  # statically built.
-  staticFlags =
-    assert static -> ppl.dontDisableStatic == true;
-    if static then " --enable-static --disable-shared --with-host-libstdcxx=-lstdc++" else "";
-    
-in
+{ fetchurl, stdenv, ppl }:
 
 stdenv.mkDerivation rec {
   name = "cloog-ppl-0.15.11";
@@ -21,11 +10,10 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [ ppl ];
 
-  configureFlags = "--with-ppl=${ppl}" + staticFlags;
-  dontDisableStatic = if static then true else false;
+  configureFlags = "--with-ppl=${ppl}";
 
   crossAttrs = {
-    configureFlags = "--with-ppl=${ppl.hostDrv}" + staticFlags;
+    configureFlags = "--with-ppl=${ppl.hostDrv}";
   };
 
   doCheck = true;
diff --git a/pkgs/development/libraries/cloog/default.nix b/pkgs/development/libraries/cloog/default.nix
index 7bd0d68c3ec2..ab5737b20ede 100644
--- a/pkgs/development/libraries/cloog/default.nix
+++ b/pkgs/development/libraries/cloog/default.nix
@@ -1,6 +1,4 @@
-{ fetchurl, stdenv, gmp, isl, static ? false }:
-
-assert static -> isl.dontDisableStatic;
+{ fetchurl, stdenv, gmp, isl }:
 
 stdenv.mkDerivation rec {
   name = "cloog-0.16.3";
@@ -14,10 +12,7 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [ isl ];
 
-  configureFlags = [ "--with-isl=system" ]
-    ++ (stdenv.lib.optionals static [ "--enable-static" "--disable-shared" ]);
-
-  dontDisableStatic = static;
+  configureFlags = [ "--with-isl=system" ];
 
   doCheck = true;
 
diff --git a/pkgs/development/libraries/gmp/default.nix b/pkgs/development/libraries/gmp/default.nix
index 1b079c051584..a633177c128d 100644
--- a/pkgs/development/libraries/gmp/default.nix
+++ b/pkgs/development/libraries/gmp/default.nix
@@ -1,28 +1,19 @@
-{stdenv, fetchurl, m4, cxx ? true, static ? false}:
-
-let
-  staticFlags = stdenv.lib.optionals static
-                  [ "--enable-static" "--disable-shared" ];
-in
+{ stdenv, fetchurl, m4, cxx ? true }:
 
 stdenv.mkDerivation rec {
-  name = "gmp-5.0.1";
+  name = "gmp-5.0.2";
 
   src = fetchurl {
     url = "mirror://gnu/gmp/${name}.tar.bz2";
-    sha256 = "1yrr14l6vvhm1g27y8nb3c75j0i4ii4k1gw7ik08safk3zq119m2";
+    sha256 = "0a2ch2kpbzrsf3c1pfc6sph87hk2xmwa6np3sn2rzsflzmvdphnv";
   };
 
-  buildNativeInputs = [m4];
+  buildNativeInputs = [ m4 ];
 
   configureFlags =
     # Build a "fat binary", with routines for several sub-architectures (x86).
     [ "--enable-fat" ]
-
-    ++ (if cxx then [ "--enable-cxx" ] else [ "--disable-cxx" ])
-    ++ staticFlags;
-
-  dontDisableStatic = if static then true else false;
+    ++ (if cxx then [ "--enable-cxx" ] else [ "--disable-cxx" ]);
 
   doCheck = true;
 
diff --git a/pkgs/development/libraries/isl/default.nix b/pkgs/development/libraries/isl/default.nix
index 65c0bc0c1d2e..b080064d3939 100644
--- a/pkgs/development/libraries/isl/default.nix
+++ b/pkgs/development/libraries/isl/default.nix
@@ -1,7 +1,7 @@
-{stdenv, fetchurl, gmp, static ? false}:
+{ stdenv, fetchurl, gmp }:
 
 stdenv.mkDerivation rec {
-  name = "isl-0.07";             # CLooG 0.16.3 fails to build with ISL 0.08.
+  name = "isl-0.07"; # CLooG 0.16.3 fails to build with ISL 0.08.
 
   src = fetchurl {
     url = "http://www.kotnet.org/~skimo/isl/${name}.tar.bz2";
@@ -10,10 +10,6 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ gmp ];
 
-  dontDisableStatic = static;
-  configureFlags =
-    stdenv.lib.optionals static [ " --enable-static" "--disable-shared" ];
-
   meta = {
     homepage = http://www.kotnet.org/~skimo/isl/;
     license = "LGPLv2.1";
diff --git a/pkgs/development/libraries/ppl/0.11.nix b/pkgs/development/libraries/ppl/0.11.nix
deleted file mode 100644
index d8ffde644de1..000000000000
--- a/pkgs/development/libraries/ppl/0.11.nix
+++ /dev/null
@@ -1,50 +0,0 @@
-{ fetchurl, stdenv, gmpxx, perl, gnum4, static ? false }:
-
-let
-  version = "0.11";
-  staticFlags = if static then " --enable-static --disable-shared --disable-watchdog" else "";
-in
-  stdenv.mkDerivation rec {
-    name = "ppl-${version}";
-
-    src = fetchurl {
-      url = "mirror://gcc/infrastructure/ppl-${version}.tar.gz";
-      sha256 = "0xqwyaj232gi0pgm6z2rihk6p8l1rngbbibnhmcrbq4jq550clrl";
-    };
-
-    buildNativeInputs = [ perl gnum4 ];
-    propagatedBuildInputs = [ gmpxx ];
-
-    dontDisableStatic = if static then true else false;
-    configureFlags = staticFlags;
-
-    # Beware!  It took ~6 hours to compile PPL and run its tests on a 1.2 GHz
-    # x86_64 box.  Nevertheless, being a dependency of GCC, it probably ought
-    # to be tested.
-    doCheck = false;
-
-    meta = {
-      description = "PPL: The Parma Polyhedra Library";
-
-      longDescription = ''
-        The Parma Polyhedra Library (PPL) provides numerical abstractions
-        especially targeted at applications in the field of analysis and
-        verification of complex systems.  These abstractions include convex
-        polyhedra, defined as the intersection of a finite number of (open or
-        closed) halfspaces, each described by a linear inequality (strict or
-        non-strict) with rational coefficients; some special classes of
-        polyhedra shapes that offer interesting complexity/precision tradeoffs;
-        and grids which represent regularly spaced points that satisfy a set of
-        linear congruence relations.  The library also supports finite
-        powersets and products of (any kind of) polyhedra and grids and a mixed
-        integer linear programming problem solver using an exact-arithmetic
-        version of the simplex algorithm.
-      '';
-
-      homepage = http://www.cs.unipr.it/ppl/;
-
-      license = "GPLv3+";
-
-      maintainers = [ stdenv.lib.maintainers.ludo ];
-    };
-  }
diff --git a/pkgs/development/libraries/ppl/default.nix b/pkgs/development/libraries/ppl/default.nix
index d8ffde644de1..8cad9022d911 100644
--- a/pkgs/development/libraries/ppl/default.nix
+++ b/pkgs/development/libraries/ppl/default.nix
@@ -1,50 +1,49 @@
-{ fetchurl, stdenv, gmpxx, perl, gnum4, static ? false }:
+{ fetchurl, stdenv, gmpxx, perl, gnum4 }:
 
-let
-  version = "0.11";
-  staticFlags = if static then " --enable-static --disable-shared --disable-watchdog" else "";
-in
-  stdenv.mkDerivation rec {
-    name = "ppl-${version}";
+let version = "0.11.2"; in
 
-    src = fetchurl {
-      url = "mirror://gcc/infrastructure/ppl-${version}.tar.gz";
-      sha256 = "0xqwyaj232gi0pgm6z2rihk6p8l1rngbbibnhmcrbq4jq550clrl";
-    };
+stdenv.mkDerivation rec {
+  name = "ppl-${version}";
 
-    buildNativeInputs = [ perl gnum4 ];
-    propagatedBuildInputs = [ gmpxx ];
+  src = fetchurl {
+    url = "http://bugseng.com/products/ppl/download/ftp/releases/${version}/ppl-${version}.tar.bz2";
+    sha256 = "1sxviip4yk6gp453pid5scy1ba66dzdpr02i1416yk7lkv0x3yz3";
+  };
 
-    dontDisableStatic = if static then true else false;
-    configureFlags = staticFlags;
+  buildNativeInputs = [ perl gnum4 ];
+  propagatedBuildInputs = [ gmpxx ];
 
-    # Beware!  It took ~6 hours to compile PPL and run its tests on a 1.2 GHz
-    # x86_64 box.  Nevertheless, being a dependency of GCC, it probably ought
-    # to be tested.
-    doCheck = false;
+  configureFlags = "--disable-watchdog";
 
-    meta = {
-      description = "PPL: The Parma Polyhedra Library";
+  # Beware!  It took ~6 hours to compile PPL and run its tests on a 1.2 GHz
+  # x86_64 box.  Nevertheless, being a dependency of GCC, it probably ought
+  # to be tested.
+  doCheck = false;
 
-      longDescription = ''
-        The Parma Polyhedra Library (PPL) provides numerical abstractions
-        especially targeted at applications in the field of analysis and
-        verification of complex systems.  These abstractions include convex
-        polyhedra, defined as the intersection of a finite number of (open or
-        closed) halfspaces, each described by a linear inequality (strict or
-        non-strict) with rational coefficients; some special classes of
-        polyhedra shapes that offer interesting complexity/precision tradeoffs;
-        and grids which represent regularly spaced points that satisfy a set of
-        linear congruence relations.  The library also supports finite
-        powersets and products of (any kind of) polyhedra and grids and a mixed
-        integer linear programming problem solver using an exact-arithmetic
-        version of the simplex algorithm.
-      '';
+  enableParallelBuilding = true;
 
-      homepage = http://www.cs.unipr.it/ppl/;
+  meta = {
+    description = "PPL: The Parma Polyhedra Library";
 
-      license = "GPLv3+";
+    longDescription = ''
+      The Parma Polyhedra Library (PPL) provides numerical abstractions
+      especially targeted at applications in the field of analysis and
+      verification of complex systems.  These abstractions include convex
+      polyhedra, defined as the intersection of a finite number of (open or
+      closed) halfspaces, each described by a linear inequality (strict or
+      non-strict) with rational coefficients; some special classes of
+      polyhedra shapes that offer interesting complexity/precision tradeoffs;
+      and grids which represent regularly spaced points that satisfy a set of
+      linear congruence relations.  The library also supports finite
+      powersets and products of (any kind of) polyhedra and grids and a mixed
+      integer linear programming problem solver using an exact-arithmetic
+      version of the simplex algorithm.
+    '';
 
-      maintainers = [ stdenv.lib.maintainers.ludo ];
-    };
-  }
+    homepage = http://www.cs.unipr.it/ppl/;
+
+    license = "GPLv3+";
+
+    maintainers = [ stdenv.lib.maintainers.ludo ];
+  };
+}
diff --git a/pkgs/development/tools/misc/binutils/default.nix b/pkgs/development/tools/misc/binutils/default.nix
index e2e3c0f14cd3..526bc45f8bcd 100644
--- a/pkgs/development/tools/misc/binutils/default.nix
+++ b/pkgs/development/tools/misc/binutils/default.nix
@@ -45,6 +45,8 @@ stdenv.mkDerivation rec {
       + stdenv.lib.optionalString (cross != null) " --target=${cross.config}"
       + stdenv.lib.optionalString gold " --enable-gold";
 
+  enableParallelBuilding = true;
+      
   meta = {
     description = "GNU Binutils, tools for manipulating binaries (linker, assembler, etc.)";
 
diff --git a/pkgs/os-specific/linux/kernel-headers/default.nix b/pkgs/os-specific/linux/kernel-headers/default.nix
index 71b3b39baabc..c0f949186c60 100644
--- a/pkgs/os-specific/linux/kernel-headers/default.nix
+++ b/pkgs/os-specific/linux/kernel-headers/default.nix
@@ -4,7 +4,7 @@ assert cross == null -> stdenv.isLinux;
 
 let
   version = "2.6.35.14";
-  kernelHeadersBaseConfig = if (cross == null) then
+  kernelHeadersBaseConfig = if cross == null then
       stdenv.platform.kernelHeadersBaseConfig
     else
       cross.platform.kernelHeadersBaseConfig;
diff --git a/pkgs/stdenv/adapters.nix b/pkgs/stdenv/adapters.nix
index a1e8aafd7bc6..11ee83b94566 100644
--- a/pkgs/stdenv/adapters.nix
+++ b/pkgs/stdenv/adapters.nix
@@ -109,13 +109,14 @@ rec {
     } // {inherit fetchurl;};
 
     
-  # Return a modified stdenv that enables building static libraries.
-  enableStaticLibraries = stdenv: stdenv //
+  # Return a modified stdenv that builds static libraries instead of
+  # shared libraries.
+  makeStaticLibraries = stdenv: stdenv //
     { mkDerivation = args: stdenv.mkDerivation (args // {
         dontDisableStatic = true;
         configureFlags =
-          (if args ? configureFlags then args.configureFlags else "")
-          + " --enable-static";
+          (if args ? configureFlags then toString args.configureFlags else "")
+          + " --enable-static --disable-shared";
       });
     } // {inherit fetchurl;};
 
diff --git a/pkgs/stdenv/generic/default.nix b/pkgs/stdenv/generic/default.nix
index eca128bcd754..b26bda91695f 100644
--- a/pkgs/stdenv/generic/default.nix
+++ b/pkgs/stdenv/generic/default.nix
@@ -1,6 +1,6 @@
 { system, name, preHook ? null, postHook ? null, initialPath, gcc, shell
 , param1 ? "", param2 ? "", param3 ? "", param4 ? "", param5 ? ""
-, extraAttrs ? {}, overrides ? {}
+, extraAttrs ? {}, overrides ? (pkgs: {})
 
 , # The `fetchurl' to use for downloading curl and its dependencies
   # (see all-packages.nix).
diff --git a/pkgs/stdenv/linux/default.nix b/pkgs/stdenv/linux/default.nix
index 5385fb75e214..62ad647064eb 100644
--- a/pkgs/stdenv/linux/default.nix
+++ b/pkgs/stdenv/linux/default.nix
@@ -5,7 +5,7 @@
 # ensuring purity of components produced by it.
 
 # The function defaults are for easy testing.
-{ system ? "i686-linux"
+{ system ? builtins.currentSystem
 , allPackages ? import ../../top-level/all-packages.nix
 , platform ? null }:
 
@@ -77,7 +77,7 @@ rec {
   # This function builds the various standard environments used during
   # the bootstrap.
   stdenvBootFun =
-    {gcc, extraAttrs ? {}, overrides ? {}, extraPath ? [], fetchurl}:
+    {gcc, extraAttrs ? {}, overrides ? (pkgs: {}), extraPath ? [], fetchurl}:
 
     import ../generic {
       inherit system;
@@ -97,7 +97,7 @@ rec {
       # Having the proper 'platform' in all the stdenvs allows getting proper
       # linuxHeaders for example.
       extraAttrs = extraAttrs // { inherit platform; };
-      overrides = overrides // {
+      overrides = pkgs: (overrides pkgs) // {
         inherit fetchurl;
       };
     };
@@ -156,23 +156,25 @@ rec {
   
 
   # 2) These are the packages that we can build with the first
-  #    stdenv.  We only need binutils, because recent glibcs
-  #    require recent binutils, and those in bootstrap-tools may
-  #    be too old. (in step 3).
+  #    stdenv.  We only need binutils, because recent Glibcs
+  #    require recent Binutils, and those in bootstrap-tools may
+  #    be too old.
   stdenvLinuxBoot1Pkgs = allPackages {
     inherit system platform;
     bootStdenv = stdenvLinuxBoot1;
   };
 
-  firstBinutils = stdenvLinuxBoot1Pkgs.binutils;
-
+  
   # 3) 2nd stdenv that we will use to build only the glibc.
   stdenvLinuxBoot2 = stdenvBootFun {
     gcc = wrapGCC {
       libc = bootstrapGlibc;
-      binutils = firstBinutils;
+      binutils = stdenvLinuxBoot1Pkgs.binutils;
       coreutils = bootstrapTools;
     };
+    overrides = pkgs: {
+      inherit (stdenvLinuxBoot1Pkgs) perl;
+    };
     inherit fetchurl;
   };
 
@@ -199,9 +201,18 @@ rec {
       coreutils = bootstrapTools;
       libc = stdenvLinuxGlibc;
     };
-    overrides = {
+    overrides = pkgs: {
       glibc = stdenvLinuxGlibc;
       inherit (stdenvLinuxBoot1Pkgs) perl;
+      # Link GCC statically against GMP etc.  This makes sense because
+      # these builds of the libraries are only used by GCC, so it
+      # reduces the size of the stdenv closure.
+      gmp = pkgs.gmp.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
+      mpfr = pkgs.mpfr.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
+      mpc = pkgs.mpc.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
+      isl = pkgs.isl.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
+      cloog = pkgs.cloog.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
+      ppl = pkgs.ppl.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
     };
     inherit fetchurl;
   };
@@ -213,22 +224,7 @@ rec {
     bootStdenv = stdenvLinuxBoot3;
   };
 
-  gccWithStaticLibs = stdenvLinuxBoot3Pkgs.gcc.gcc.override (rec {
-    ppl = stdenvLinuxBoot3Pkgs.ppl.override {
-      static = true;
-      gmpxx = stdenvLinuxBoot3Pkgs.gmpxx.override {
-        static = true;
-      };
-    };
-    cloog = stdenvLinuxBoot3Pkgs.cloog.override {
-      isl = stdenvLinuxBoot3Pkgs.isl.override {
-        static = true;
-      };
-      static = true;
-    };
-    cloogppl = null;
-  });
-
+  
   # 8) Construct a fourth stdenv identical to the second, except that
   #    this one uses the dynamically linked GCC and Binutils from step
   #    5.  The other tools (e.g. coreutils) are still from the
@@ -238,11 +234,12 @@ rec {
       inherit (stdenvLinuxBoot3Pkgs) binutils;
       coreutils = bootstrapTools;
       libc = stdenvLinuxGlibc;
-      gcc = gccWithStaticLibs;
+      gcc = stdenvLinuxBoot3Pkgs.gcc.gcc;
       name = "";
     };
-    overrides = {
+    overrides = pkgs: {
       inherit (stdenvLinuxBoot1Pkgs) perl;
+      inherit (stdenvLinuxBoot3Pkgs) gettext gnum4 xz gmp;
     };
     inherit fetchurl;
   };
@@ -277,7 +274,7 @@ rec {
       inherit (stdenvLinuxBoot3Pkgs) binutils;
       inherit (stdenvLinuxBoot4Pkgs) coreutils;
       libc = stdenvLinuxGlibc;
-      gcc = gccWithStaticLibs;
+      gcc = stdenvLinuxBoot3Pkgs.gcc.gcc;
       shell = stdenvLinuxBoot4Pkgs.bash + "/bin/bash";
       name = "";
     };
@@ -291,7 +288,7 @@ rec {
       inherit platform;
     };
 
-    overrides = {
+    overrides = pkgs: {
       inherit gcc;
       inherit (stdenvLinuxBoot3Pkgs) binutils glibc;
       inherit (stdenvLinuxBoot4Pkgs)
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index fc7875aeb4b9..3b027e3cf7e3 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -108,7 +108,7 @@ let
       # overrided packages will not be built with the crossStdenv
       # adapter.
       overrides = overrider pkgsOrig //
-        (lib.optionalAttrs (pkgsOrig.stdenv ? overrides && crossSystem == null) pkgsOrig.stdenv.overrides);
+        (lib.optionalAttrs (pkgsOrig.stdenv ? overrides && crossSystem == null) (pkgsOrig.stdenv.overrides pkgsOrig));
 
       # The un-overriden packages, passed to `overrider'.
       pkgsOrig = pkgsFun pkgs {};
@@ -1208,11 +1208,8 @@ let
 
   ppl = callPackage ../development/libraries/ppl { };
 
-  ppl0_11 = callPackage ../development/libraries/ppl/0.11.nix { };
-
   /* WARNING: this version is unsuitable for using with a setuid wrapper */
-  ppp = builderDefsPackage (import ../tools/networking/ppp) {
-  };
+  ppp = builderDefsPackage (import ../tools/networking/ppp) { };
 
   pptp = callPackage ../tools/networking/pptp {};
 
@@ -1777,8 +1774,7 @@ let
   gcc46_realCross = lib.addMetaAttrs { platforms = []; }
     (makeOverridable (import ../development/compilers/gcc-4.6) {
       inherit fetchurl stdenv texinfo gmp mpfr mpc libelf zlib
-        cloog gettext which noSysDirs;
-      ppl = ppl0_11;
+        cloog ppl gettext which noSysDirs;
       binutilsCross = binutilsCross;
       libcCross = libcCross;
       profiledCompiler = false;
@@ -1878,9 +1874,6 @@ let
     libcCross = null;
     binutilsCross = null;
 
-    ppl = ppl0_11;
-    cloogppl = null;
-
     # bootstrapping a profiled compiler does not work in the sheevaplug:
     # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43944
     profiledCompiler = if stdenv.system == "armv5tel-linux" then false else true;
@@ -1894,9 +1887,6 @@ let
     cross = null;
     libcCross = null;
     binutilsCross = null;
-
-    ppl = ppl0_11;
-    cloogppl = null;
   }));
 
   gccApple =
@@ -2047,7 +2037,6 @@ let
     gnatboot = gnat45;
     # We can't use the ppl stuff, because we would have
     # libstdc++ problems.
-    cloogppl = null;
     ppl = null;
     cloog = null;
   });
@@ -2547,7 +2536,8 @@ let
   # compatibility issues in 2.47 - at list 2.44.1 is known good
   # for sbcl bootstrap
   clisp_2_44_1 = callPackage ../development/interpreters/clisp/2.44.1.nix {
-    libsigsegv = libsigsegv_25;  };
+    libsigsegv = libsigsegv_25;
+  };
 
   clojure = callPackage ../development/interpreters/clojure { };
 
@@ -3555,17 +3545,9 @@ let
   gmp =
     if stdenv.system == "i686-darwin" then
       # GMP 4.3.2 is broken on Darwin, so use 4.3.1.
-      makeOverridable (import ../development/libraries/gmp/4.3.1.nix) {
-        inherit stdenv fetchurl m4;
-        cxx = false;
-      }
+      callPackage ../development/libraries/gmp/4.3.1.nix { }
     else
-      # We temporarily leave gmp 4 here, waiting for a new ppl/cloog-ppl that
-      # would build well with gmp 5.
-      makeOverridable (import ../development/libraries/gmp/4.nix) {
-        inherit stdenv fetchurl m4;
-        cxx = false;
-      };
+      callPackage ../development/libraries/gmp { };
 
   gmpxx = gmp.override { cxx = true; };