diff --git a/pkgs/applications/science/math/maxima/default.nix b/pkgs/applications/science/math/maxima/default.nix
index e9728ac984d..a06d3805209 100644
--- a/pkgs/applications/science/math/maxima/default.nix
+++ b/pkgs/applications/science/math/maxima/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   meta = {
     description = "Maxima computer algebra system";
     homepage = http://maxima.sourceforge.net;
+    platforms = stdenv.lib.platforms.all;
+    maintainers = [ stdenv.lib.maintainers.simons ];
   };
-
-  maintainers = [ stdenv.lib.maintainers.simons ];
 }
diff --git a/pkgs/development/interpreters/maude/default.nix b/pkgs/development/interpreters/maude/default.nix
index c41c17c6e3c..4dc64fc15a9 100644
--- a/pkgs/development/interpreters/maude/default.nix
+++ b/pkgs/development/interpreters/maude/default.nix
@@ -3,12 +3,6 @@
 stdenv.mkDerivation rec {
   name = "maude-2.4";
 
-  meta = {
-    homepage = "http://maude.cs.uiuc.edu/";
-    description = "Maude -- a high-level specification language";
-    license = "GPLv2";
-  };
-
   src = fetchurl {
     url = "http://maude.cs.uiuc.edu/download/current/Maude-2.4.tar.gz";
     sha256 = "0bydkf8fd5v267bfak4mm5lmm3vvnr6ir1jr7gimgyzqygdk0in2";
@@ -43,5 +37,11 @@ stdenv.mkDerivation rec {
     mv maude-2.3.0-extras/* $out/share/doc/maude/
   '';
 
-  maintainers = [ stdenv.lib.maintainers.simons ];
+  meta = {
+    homepage = "http://maude.cs.uiuc.edu/";
+    description = "Maude -- a high-level specification language";
+    license = "GPLv2";
+    platforms = stdenv.lib.platforms.all;
+    maintainers = [ stdenv.lib.maintainers.simons ];
+  };
 }
diff --git a/pkgs/development/tools/build-managers/scons/default.nix b/pkgs/development/tools/build-managers/scons/default.nix
index 2e72047354c..3e549fe7bbe 100644
--- a/pkgs/development/tools/build-managers/scons/default.nix
+++ b/pkgs/development/tools/build-managers/scons/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
        SCons is an easier, more reliable and faster way to build
        software.
     '';
+    platforms = stdenv.lib.platforms.all;
+    maintainers = [ stdenv.lib.maintainers.simons ];
   };
-
-  maintainers = [ stdenv.lib.maintainers.simons ];
 }
diff --git a/pkgs/tools/networking/pdsh/default.nix b/pkgs/tools/networking/pdsh/default.nix
index 3ea7a7bdd5c..1034d7e09f5 100644
--- a/pkgs/tools/networking/pdsh/default.nix
+++ b/pkgs/tools/networking/pdsh/default.nix
@@ -2,11 +2,6 @@
 
 stdenv.mkDerivation rec {
   name = "pdsh-2.18";
-  meta = {
-    homepage = "https://computing.llnl.gov/linux/pdsh.html";
-    description = "A high-performance, parallel remote shell utility.";
-    license = "GPLv2";
-  };
   src = fetchurl {
     url = "mirror://sourceforge/pdsh/${name}.tar.bz2";
     sha256 = "8c94acb17b4af8a9f553db180b4d5745c9c98844a5dc070e2ce80590e8e8a539";
@@ -40,5 +35,11 @@ stdenv.mkDerivation rec {
                  + " --disable-debug"
                  ;
 
-  maintainers = [ stdenv.lib.maintainers.simons ];
+  meta = {
+    homepage = "https://computing.llnl.gov/linux/pdsh.html";
+    description = "A high-performance, parallel remote shell utility.";
+    license = "GPLv2";
+    platforms = stdenv.lib.platforms.all;
+    maintainers = [ stdenv.lib.maintainers.simons ];
+  };
 }