diff --git a/pkgs/development/compilers/gcc/all.nix b/pkgs/development/compilers/gcc/all.nix
index 82a64f48c37e..70b4b75369a7 100644
--- a/pkgs/development/compilers/gcc/all.nix
+++ b/pkgs/development/compilers/gcc/all.nix
@@ -34,9 +34,6 @@ let
               else            /* "4.8" */   isl_0_14;
       } // lib.optionalAttrs (majorMinorVersion == "4.8") {
         texinfo = texinfo5; # doesn't validate since 6.1 -> 6.3 bump
-      } // lib.optionalAttrs (majorMinorVersion == "4.9") {
-        # Build fails on Darwin with clang
-        stdenv = if stdenv.isDarwin then gccStdenv else stdenv;
       } // lib.optionalAttrs (!(atLeast "6")) {
         cloog = if stdenv.isDarwin
                 then null
diff --git a/pkgs/development/compilers/gcc/default.nix b/pkgs/development/compilers/gcc/default.nix
index 0980944dfc29..895aed5461c1 100644
--- a/pkgs/development/compilers/gcc/default.nix
+++ b/pkgs/development/compilers/gcc/default.nix
@@ -408,7 +408,7 @@ lib.pipe ((callFile ./common/builder.nix {}) ({
       maintainers
     ;
   } // lib.optionalAttrs (!atLeast11) {
-    badPlatforms = if !is49 then [ "aarch64-darwin" ] else lib.platforms.darwin;
+    badPlatforms = if !(is48 || is49) then [ "aarch64-darwin" ] else lib.platforms.darwin;
   };
 } // optionalAttrs is7 {
   env.NIX_CFLAGS_COMPILE = lib.optionalString (stdenv.cc.isClang && langFortran) "-Wno-unused-command-line-argument";