diff --git a/pkgs/applications/editors/emacs-22/default.nix b/pkgs/applications/editors/emacs-22/default.nix
index 8905ab1c85a..da3c4babbf6 100644
--- a/pkgs/applications/editors/emacs-22/default.nix
+++ b/pkgs/applications/editors/emacs-22/default.nix
@@ -43,6 +43,6 @@ stdenv.mkDerivation rec {
     homepage = http://www.gnu.org/software/emacs/;
     license = "GPLv3+";
 
-    platforms = linux;  # GTK & co. are needed.
+    platforms = stdenv.lib.platforms.linux;  # GTK & co. are needed.
   };
 }
diff --git a/pkgs/applications/editors/emacs-23/default.nix b/pkgs/applications/editors/emacs-23/default.nix
index 23fd3e43996..59d8af33f89 100644
--- a/pkgs/applications/editors/emacs-23/default.nix
+++ b/pkgs/applications/editors/emacs-23/default.nix
@@ -67,6 +67,6 @@ stdenv.mkDerivation rec {
     license = "GPLv3+";
 
     maintainers = [ stdenv.lib.maintainers.ludo ];
-    platforms = linux;  # GTK & co. are needed.
+    platforms = stdenv.lib.platforms.linux;  # GTK & co. are needed.
   };
 }
diff --git a/pkgs/applications/editors/emacs-snapshot/default.nix b/pkgs/applications/editors/emacs-snapshot/default.nix
index 5d0181cf66e..d190a5809cf 100644
--- a/pkgs/applications/editors/emacs-snapshot/default.nix
+++ b/pkgs/applications/editors/emacs-snapshot/default.nix
@@ -53,6 +53,6 @@ stdenv.mkDerivation {
     homepage = http://www.emacswiki.org/cgi-bin/wiki/XftGnuEmacs;
     license = "GPLv3+";
     maintainers = [ stdenv.lib.maintainers.ludo ];
-    platforms = linux;  # GTK & co. are needed.
+    platforms = stdenv.lib.platforms.linux;  # GTK & co. are needed.
   };
 }