diff --git a/pkgs/development/compilers/gcc/4.6/default.nix b/pkgs/development/compilers/gcc/4.6/default.nix
index 991d4fc883f..65b357d4c7a 100644
--- a/pkgs/development/compilers/gcc/4.6/default.nix
+++ b/pkgs/development/compilers/gcc/4.6/default.nix
@@ -170,7 +170,7 @@ let version = "4.6.4";
       "-stage-final";
     crossNameAddon = if cross != null then "-${cross.config}" + stageNameAddon else "";
 
-    bootstrap = cross == null && !stdenv.isArm && !stdenv.isMips && !stdenv.isDarwin;
+    bootstrap = cross == null && !stdenv.isArm && !stdenv.isMips;
 
 in
 
diff --git a/pkgs/development/compilers/gcc/4.8/default.nix b/pkgs/development/compilers/gcc/4.8/default.nix
index e4e38022a6b..41b29400dd8 100644
--- a/pkgs/development/compilers/gcc/4.8/default.nix
+++ b/pkgs/development/compilers/gcc/4.8/default.nix
@@ -198,7 +198,7 @@ let version = "4.8.5";
     stageNameAddon = if crossStageStatic then "-stage-static" else "-stage-final";
     crossNameAddon = if cross != null then "-${cross.config}" + stageNameAddon else "";
 
-    bootstrap = cross == null && !stdenv.isArm && !stdenv.isMips && !stdenv.isDarwin;
+    bootstrap = cross == null && !stdenv.isArm && !stdenv.isMips;
 
 in
 
diff --git a/pkgs/development/compilers/gcc/4.9/default.nix b/pkgs/development/compilers/gcc/4.9/default.nix
index 01755a74e1e..f758a1e172e 100644
--- a/pkgs/development/compilers/gcc/4.9/default.nix
+++ b/pkgs/development/compilers/gcc/4.9/default.nix
@@ -202,7 +202,7 @@ let version = "4.9.4";
     stageNameAddon = if crossStageStatic then "-stage-static" else "-stage-final";
     crossNameAddon = if cross != null then "-${cross.config}" + stageNameAddon else "";
 
-  bootstrap = cross == null && !stdenv.isDarwin;
+  bootstrap = cross == null;
 
 in
 
diff --git a/pkgs/development/compilers/gcc/5/default.nix b/pkgs/development/compilers/gcc/5/default.nix
index f5c69d24d63..0f8a0bbf794 100644
--- a/pkgs/development/compilers/gcc/5/default.nix
+++ b/pkgs/development/compilers/gcc/5/default.nix
@@ -202,7 +202,7 @@ let version = "5.4.0";
     stageNameAddon = if crossStageStatic then "-stage-static" else "-stage-final";
     crossNameAddon = if cross != null then "-${cross.config}" + stageNameAddon else "";
 
-  bootstrap = cross == null && !stdenv.isDarwin;
+  bootstrap = cross == null;
 
 in
 
diff --git a/pkgs/development/compilers/gcc/6/default.nix b/pkgs/development/compilers/gcc/6/default.nix
index 129bde908fa..6a1616154cb 100644
--- a/pkgs/development/compilers/gcc/6/default.nix
+++ b/pkgs/development/compilers/gcc/6/default.nix
@@ -201,7 +201,7 @@ let version = "6.2.0";
     stageNameAddon = if crossStageStatic then "-stage-static" else "-stage-final";
     crossNameAddon = if cross != null then "-${cross.config}" + stageNameAddon else "";
 
-  bootstrap = cross == null && !stdenv.isDarwin;
+  bootstrap = cross == null;
 
 in
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 02f5abcb5f4..35bd07a59d2 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4572,7 +4572,7 @@ in
     cross = null;
     libcCross = if crossSystem != null then libcCross else null;
 
-    isl = isl_0_14;
+    isl = if !stdenv.isDarwin then isl_0_14 else null;
   }));
 
   gcc49 = lowPrio (wrapCC (callPackage ../development/compilers/gcc/4.9 {
@@ -4587,9 +4587,9 @@ in
     cross = null;
     libcCross = if crossSystem != null then libcCross else null;
 
-    isl = isl_0_11;
+    isl = if !stdenv.isDarwin then isl_0_11 else null;
 
-    cloog = cloog_0_18_0;
+    cloog = if !stdenv.isDarwin then cloog_0_18_0 else null;
   }));
 
   gcc5 = lowPrio (wrapCC (callPackage ../development/compilers/gcc/5 {
@@ -4604,7 +4604,7 @@ in
     cross = null;
     libcCross = if crossSystem != null then libcCross else null;
 
-    isl = isl_0_14;
+    isl = if !stdenv.isDarwin then isl_0_14 else null;
   }));
 
   gcc6 = lowPrio (wrapCC (callPackage ../development/compilers/gcc/6 {
@@ -4619,7 +4619,7 @@ in
     cross = null;
     libcCross = if crossSystem != null then libcCross else null;
 
-    isl = isl_0_14;
+    isl = if !stdenv.isDarwin then isl_0_14 else null;
   }));
 
   gfortran = if !stdenv.isDarwin then gfortran5