diff --git a/pkgs/tools/backup/kopia/default.nix b/pkgs/tools/backup/kopia/default.nix
index bcf51372f6c5..32f051f5ad91 100644
--- a/pkgs/tools/backup/kopia/default.nix
+++ b/pkgs/tools/backup/kopia/default.nix
@@ -1,17 +1,17 @@
-{ lib, buildGoModule, fetchFromGitHub, coreutils }:
+{ lib, buildGoModule, fetchFromGitHub }:
 
 buildGoModule rec {
   pname = "kopia";
-  version = "0.7.3";
+  version = "0.8.4";
 
   src = fetchFromGitHub {
     owner = pname;
     repo = pname;
     rev = "v${version}";
-    sha256 = "1dnk764y71c9k9nghn9q06f2zz9igsvm4z826azil2d58h5d06j6";
+    sha256 = "sha256-Or6RL6yT/X3rVIySqt5lWbXbI25f8HNLBpY3cOhMC0g=";
   };
 
-  vendorSha256 = "1mnhq6kn0pn67l55a9k6irmjlprr295218nms3klsk2720syzdwq";
+  vendorSha256 = "sha256-1FK5IIvm2iyzGqj8IPL3/qvxFj0dC37aycQQ5MO0mBI=";
 
   doCheck = false;
 
@@ -23,12 +23,6 @@ buildGoModule rec {
        -X github.com/kopia/kopia/repo.BuildInfo=${src.rev}
   '';
 
-  postConfigure = ''
-    # speakeasy hardcodes /bin/stty https://github.com/bgentry/speakeasy/issues/22
-    substituteInPlace vendor/github.com/bgentry/speakeasy/speakeasy_unix.go \
-      --replace "/bin/stty" "${coreutils}/bin/stty"
-  '';
-
   meta = with lib; {
     homepage = "https://kopia.io";
     description = "Cross-platform backup tool with fast, incremental backups, client-side end-to-end encryption, compression and data deduplication";