diff --git a/lib/platforms.nix b/lib/platforms.nix
index 825cc4136a19..750829da3751 100644
--- a/lib/platforms.nix
+++ b/lib/platforms.nix
@@ -8,8 +8,9 @@ rec {
   openbsd = ["i686-openbsd" "x86_64-openbsd"];
   netbsd = ["i686-netbsd" "x86_64-netbsd"];
   cygwin = ["i686-cygwin" "x86_64-cygwin"];
-  unix = linux ++ darwin ++ freebsd ++ openbsd;
-  all = linux ++ darwin ++ cygwin ++ freebsd ++ openbsd;
+  illumos = ["x86_64-solaris"];
+  unix = linux ++ darwin ++ freebsd ++ openbsd ++ netbsd ++ illumos;
+  all = linux ++ darwin ++ cygwin ++ freebsd ++ openbsd ++ netbsd ++ illumos;
   none = [];
   allBut = platforms: lists.filter (x: !(builtins.elem x platforms)) all;
   mesaPlatforms = ["i686-linux" "x86_64-linux" "x86_64-darwin" "armv5tel-linux" "armv6l-linux"];
diff --git a/pkgs/development/compilers/gcc/4.8/default.nix b/pkgs/development/compilers/gcc/4.8/default.nix
index ff1d388b6e23..22c4fc22c020 100644
--- a/pkgs/development/compilers/gcc/4.8/default.nix
+++ b/pkgs/development/compilers/gcc/4.8/default.nix
@@ -519,6 +519,7 @@ stdenv.mkDerivation ({
     platforms =
       stdenv.lib.platforms.linux ++
       stdenv.lib.platforms.freebsd ++
+      stdenv.lib.platforms.illumos ++
       optionals (langAda == false) stdenv.lib.platforms.darwin;
   };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 38b954fdd1c2..8134b08f5f7b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3890,7 +3890,7 @@ let
     inherit noSysDirs;
 
     # PGO seems to speed up compilation by gcc by ~10%, see #445 discussion
-    profiledCompiler = with stdenv; (!isDarwin && (isi686 || isx86_64));
+    profiledCompiler = with stdenv; (!isSunOS && !isDarwin && (isi686 || isx86_64));
 
     # When building `gcc.crossDrv' (a "Canadian cross", with host == target
     # and host != build), `cross' must be null but the cross-libc must still