diff --git a/nixos/modules/installer/tools/nixos-generate-config.pl b/nixos/modules/installer/tools/nixos-generate-config.pl
index c6d405189b0..a3b763a8a94 100644
--- a/nixos/modules/installer/tools/nixos-generate-config.pl
+++ b/nixos/modules/installer/tools/nixos-generate-config.pl
@@ -538,9 +538,6 @@ $bootLoaderConfig
   #   uid = 1000;
   # };
 
-  # The NixOS release to be compatible with for stateful data such as databases.
-  system.stateVersion = "@nixosRelease@";
-
 }
 EOF
     } else {
diff --git a/nixos/modules/installer/tools/tools.nix b/nixos/modules/installer/tools/tools.nix
index d79c6f1c1da..2c796250a98 100644
--- a/nixos/modules/installer/tools/tools.nix
+++ b/nixos/modules/installer/tools/tools.nix
@@ -40,7 +40,6 @@ let
     src = ./nixos-generate-config.pl;
     path = [ pkgs.btrfsProgs ];
     perl = "${pkgs.perl}/bin/perl -I${pkgs.perlPackages.FileSlurp}/lib/perl5/site_perl";
-    inherit (config.system) nixosRelease;
   };
 
   nixos-option = makeProg {
diff --git a/nixos/modules/misc/version.nix b/nixos/modules/misc/version.nix
index 80036fc287e..8ea6d8339db 100644
--- a/nixos/modules/misc/version.nix
+++ b/nixos/modules/misc/version.nix
@@ -6,22 +6,6 @@ with lib;
 
   options = {
 
-    system.stateVersion = mkOption {
-      type = types.str;
-      default = "14.12";
-      description = ''
-        Every once in a while, a new NixOS release may change
-        configuration defaults in a way incompatible with stateful
-        data. For instance, if the default version of PostgreSQL
-        changes, the new version will probably be unable to read your
-        existing databases. To prevent such breakage, you can set the
-        value of this option to the NixOS release with which you want
-        to be compatible. The effect is that NixOS will option
-        defaults corresponding to the specified release (such as using
-        an older version of PostgreSQL).
-      '';
-    };
-
     system.nixosVersion = mkOption {
       internal = true;
       type = types.str;