diff --git a/overlays/poetry.nix b/overlays/poetry.nix
new file mode 100644
index 0000000..d1ab570
--- /dev/null
+++ b/overlays/poetry.nix
@@ -0,0 +1,15 @@
+self: super: {
+  # python-poetry/poetry#5929
+  poetry = super.poetry.overrideAttrs (old: {
+    postInstall = let
+      # 'xyz'' => "xyz"'
+      match = "'([^']+)''";
+      replace = "\"$1\"'";
+    in ''
+      installShellCompletion --cmd poetry \
+        --bash <($out/bin/poetry completions bash) \
+        --zsh <($out/bin/poetry completions zsh) \
+        --fish <($out/bin/poetry completions fish | ${super.sd}/bin/sd "${match}" "${replace}")
+    '';
+  });
+}