diff --git a/pkgs/applications/editors/emacs-modes/melpa-generated.nix b/pkgs/applications/editors/emacs-modes/melpa-generated.nix
index faf73def6db..99d08e87f67 100644
--- a/pkgs/applications/editors/emacs-modes/melpa-generated.nix
+++ b/pkgs/applications/editors/emacs-modes/melpa-generated.nix
@@ -47126,12 +47126,12 @@
     nix-buffer = callPackage ({ emacs, f, fetchFromGitHub, fetchurl, lib, melpaBuild }:
     melpaBuild {
         pname = "nix-buffer";
-        version = "20170305.1601";
+        version = "20170520.553";
         src = fetchFromGitHub {
           owner = "shlevy";
           repo = "nix-buffer";
-          rev = "89d30002eddcc33c5c74dcc871a97aee0228d403";
-          sha256 = "0pz1p8mdk988x4k41qi3j8rf6g33gj6lx4dm9sgfyzgzi9ixyma8";
+          rev = "749f48b510d0fd47dac67850f4089119fbff142a";
+          sha256 = "1iav1s2vc2ivkah9v42961vpk74z8961ybyxq0cnswzjb1xi5n25";
         };
         recipeFile = fetchurl {
           url = "https://raw.githubusercontent.com/milkypostman/melpa/08b978724ff26b3ea7a134d307d888c80e2a92a9/recipes/nix-buffer";
diff --git a/pkgs/applications/editors/emacs-modes/melpa-stable-generated.nix b/pkgs/applications/editors/emacs-modes/melpa-stable-generated.nix
index 83d9a0b899c..8ac454a5047 100644
--- a/pkgs/applications/editors/emacs-modes/melpa-stable-generated.nix
+++ b/pkgs/applications/editors/emacs-modes/melpa-stable-generated.nix
@@ -23319,12 +23319,12 @@
     nix-buffer = callPackage ({ emacs, f, fetchFromGitHub, fetchurl, lib, melpaBuild }:
     melpaBuild {
         pname = "nix-buffer";
-        version = "3.0.0";
+        version = "3.0.1";
         src = fetchFromGitHub {
           owner = "shlevy";
           repo = "nix-buffer";
-          rev = "89d30002eddcc33c5c74dcc871a97aee0228d403";
-          sha256 = "0pz1p8mdk988x4k41qi3j8rf6g33gj6lx4dm9sgfyzgzi9ixyma8";
+          rev = "749f48b510d0fd47dac67850f4089119fbff142a";
+          sha256 = "1iav1s2vc2ivkah9v42961vpk74z8961ybyxq0cnswzjb1xi5n25";
         };
         recipeFile = fetchurl {
           url = "https://raw.githubusercontent.com/milkypostman/melpa/08b978724ff26b3ea7a134d307d888c80e2a92a9/recipes/nix-buffer";