diff --git a/pkgs/applications/editors/emacs-modes/melpa-packages.nix b/pkgs/applications/editors/emacs-modes/melpa-packages.nix
index ccf4ac5ee26..aee8d1dda16 100644
--- a/pkgs/applications/editors/emacs-modes/melpa-packages.nix
+++ b/pkgs/applications/editors/emacs-modes/melpa-packages.nix
@@ -242,6 +242,12 @@ env NIXPKGS_ALLOW_BROKEN=1 nix-instantiate --show-trace ../../../../ -A emacsPac
             (attrs.nativeBuildInputs or []) ++ [ external.git ];
         });
 
+        magit-tbdiff = super.magit-tbdiff.overrideAttrs (attrs: {
+          # searches for Git at build time
+          nativeBuildInputs =
+            (attrs.nativeBuildInputs or []) ++ [ external.git ];
+        });
+
         magit-annex = super.magit-annex.overrideAttrs (attrs: {
           # searches for Git at build time
           nativeBuildInputs =