diff --git a/pkgs/tools/backup/tarsnap/default.nix b/pkgs/tools/backup/tarsnap/default.nix
index 1b151ece3d95..e55823e59ae4 100644
--- a/pkgs/tools/backup/tarsnap/default.nix
+++ b/pkgs/tools/backup/tarsnap/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, openssl, zlib, e2fsprogs }:
+{ lib, stdenv, fetchurl, openssl, zlib, e2fsprogs, bash }:
 
 let
   zshCompletion = fetchurl {
@@ -8,11 +8,11 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "tarsnap";
-  version = "1.0.39";
+  version = "1.0.40";
 
   src = fetchurl {
     url = "https://www.tarsnap.com/download/tarsnap-autoconf-${version}.tgz";
-    sha256 = "10i0whbmb345l2ggnf4vs66qjcyf6hmlr8f4nqqcfq0h5a5j24sn";
+    sha256 = "1mbzq81l4my5wdhyxyma04sblr43m8p7ryycbpi6n78w1hwfbjmw";
   };
 
   preConfigure = ''
@@ -22,6 +22,8 @@ stdenv.mkDerivation rec {
   patchPhase = ''
     substituteInPlace Makefile.in \
       --replace "command -p mv" "mv"
+    substituteInPlace configure \
+      --replace "command -p getconf PATH" "echo $PATH"
   '';
 
   postInstall = ''