diff --git a/pkgs/tools/misc/trash-cli/default.nix b/pkgs/tools/misc/trash-cli/default.nix
index 40fc72a0d71..77308ecf2ed 100644
--- a/pkgs/tools/misc/trash-cli/default.nix
+++ b/pkgs/tools/misc/trash-cli/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, coreutils
+{ stdenv, fetchFromGitHub, fetchpatch, coreutils
 , python3, python3Packages, substituteAll }:
 
 assert stdenv.isLinux;
@@ -21,6 +21,12 @@ python3Packages.buildPythonApplication rec {
       df = "${coreutils}/bin/df";
       libc = "${stdenv.cc.libc.out}/lib/libc.so.6";
     })
+
+    # Fix build on Python 3.6.
+    (fetchpatch {
+      url = "https://github.com/andreafrancia/trash-cli/commit/a21b80d1e69783bb09376c3f60dd2f2a10578805.patch";
+      sha256 = "0w49rjh433sjfc2cl5a9wlbr6kcn9f1qg905qsyv7ay3ar75wvyp";
+    })
   ];
 
   buildInputs = with python3Packages; [ nose mock ];