diff --git a/pkgs/development/compilers/gcc/4.5/default.nix b/pkgs/development/compilers/gcc/4.5/default.nix
index 01ce4bde0960..971726b8ab90 100644
--- a/pkgs/development/compilers/gcc/4.5/default.nix
+++ b/pkgs/development/compilers/gcc/4.5/default.nix
@@ -344,8 +344,7 @@ stdenv.mkDerivation ({
 
     # On GNU/Hurd glibc refers to Mach & Hurd
     # headers.
-    ++ optionals (libcCross != null &&
-                  hasAttr "propagatedBuildInputs" libcCross)
+    ++ optionals (libcCross != null && libcCross ? propagatedBuildInputs)
                  libcCross.propagatedBuildInputs);
 
   LIBRARY_PATH = makeLibraryPath ([]
diff --git a/pkgs/development/compilers/gcc/4.8/default.nix b/pkgs/development/compilers/gcc/4.8/default.nix
index 38ff23f86a6d..ee7ddccced77 100644
--- a/pkgs/development/compilers/gcc/4.8/default.nix
+++ b/pkgs/development/compilers/gcc/4.8/default.nix
@@ -467,7 +467,7 @@ stdenv.mkDerivation ({
 
     # On GNU/Hurd glibc refers to Mach & Hurd
     # headers.
-    ++ optionals (libcCross != null && libcCross ? "propagatedBuildInputs" )
+    ++ optionals (libcCross != null && libcCross ? propagatedBuildInputs)
                  libcCross.propagatedBuildInputs);
 
   LIBRARY_PATH = makeLibraryPath ([]
diff --git a/pkgs/development/compilers/gcc/4.9/default.nix b/pkgs/development/compilers/gcc/4.9/default.nix
index 04e67e44f773..1380d36725a1 100644
--- a/pkgs/development/compilers/gcc/4.9/default.nix
+++ b/pkgs/development/compilers/gcc/4.9/default.nix
@@ -473,7 +473,7 @@ stdenv.mkDerivation ({
 
     # On GNU/Hurd glibc refers to Mach & Hurd
     # headers.
-    ++ optionals (libcCross != null && libcCross ? "propagatedBuildInputs" )
+    ++ optionals (libcCross != null && libcCross ? propagatedBuildInputs)
                  libcCross.propagatedBuildInputs);
 
   LIBRARY_PATH = makeLibraryPath ([]
diff --git a/pkgs/development/compilers/gcc/5/default.nix b/pkgs/development/compilers/gcc/5/default.nix
index e95ef92c3f65..536433ff3c6a 100644
--- a/pkgs/development/compilers/gcc/5/default.nix
+++ b/pkgs/development/compilers/gcc/5/default.nix
@@ -491,7 +491,7 @@ stdenv.mkDerivation ({
 
     # On GNU/Hurd glibc refers to Mach & Hurd
     # headers.
-    ++ optionals (libcCross != null && libcCross ? "propagatedBuildInputs" )
+    ++ optionals (libcCross != null && libcCross ? "propagatedBuildInputs")
                  libcCross.propagatedBuildInputs);
 
   LIBRARY_PATH = makeLibraryPath ([]
diff --git a/pkgs/development/compilers/gcc/6/default.nix b/pkgs/development/compilers/gcc/6/default.nix
index 71e2238a27fb..fa42bb5b8512 100644
--- a/pkgs/development/compilers/gcc/6/default.nix
+++ b/pkgs/development/compilers/gcc/6/default.nix
@@ -481,7 +481,7 @@ stdenv.mkDerivation ({
 
     # On GNU/Hurd glibc refers to Mach & Hurd
     # headers.
-    ++ optionals (libcCross != null && libcCross ? "propagatedBuildInputs")
+    ++ optionals (libcCross != null && libcCross ? propagatedBuildInputs)
                  libcCross.propagatedBuildInputs);
 
   LIBRARY_PATH = makeLibraryPath ([]
diff --git a/pkgs/development/compilers/gcc/7/default.nix b/pkgs/development/compilers/gcc/7/default.nix
index 0ef71a636e21..67b7dee446fb 100644
--- a/pkgs/development/compilers/gcc/7/default.nix
+++ b/pkgs/development/compilers/gcc/7/default.nix
@@ -483,7 +483,7 @@ stdenv.mkDerivation ({
 
     # On GNU/Hurd glibc refers to Mach & Hurd
     # headers.
-    ++ optionals (libcCross != null && libcCross ? "propagatedBuildInputs")
+    ++ optionals (libcCross != null && libcCross ? propagatedBuildInputs)
                  libcCross.propagatedBuildInputs);
 
   LIBRARY_PATH = makeLibraryPath ([]
diff --git a/pkgs/development/compilers/gcc/snapshot/default.nix b/pkgs/development/compilers/gcc/snapshot/default.nix
index f3d8d27d90c6..518ee5c7054b 100644
--- a/pkgs/development/compilers/gcc/snapshot/default.nix
+++ b/pkgs/development/compilers/gcc/snapshot/default.nix
@@ -470,7 +470,7 @@ stdenv.mkDerivation ({
 
     # On GNU/Hurd glibc refers to Mach & Hurd
     # headers.
-    ++ optionals (libcCross != null && libcCross ? "propagatedBuildInputs")
+    ++ optionals (libcCross != null && libcCross ? propagatedBuildInputs)
                  libcCross.propagatedBuildInputs);
 
   LIBRARY_PATH = makeLibraryPath ([]