diff --git a/default.nix b/default.nix
index 2527bcab2bc5db49b3b2106ec314e745ba9fdd74..5e1a78ff9418c3c74f72284daf69cd786c29f702 100644
--- a/default.nix
+++ b/default.nix
@@ -84,5 +84,8 @@ in
           ''
             mkdir -p $out/bin
             ln -s ${python-env}/bin/tahoe $out/bin
+            # Include some tools that are useful for debugging.
+            ln -s ${python-env}/bin/flogtool $out/bin
+            ln -s ${python-env}/bin/eliot-prettyprint $out/bin
           '';
     }