diff --git a/pkgs/development/tools/purescript/spago/spago.nix b/pkgs/development/tools/purescript/spago/spago.nix
index b5cc43a6724..e3636e16f58 100644
--- a/pkgs/development/tools/purescript/spago/spago.nix
+++ b/pkgs/development/tools/purescript/spago/spago.nix
@@ -14,11 +14,11 @@
 }:
 mkDerivation {
   pname = "spago";
-  version = "0.20.8";
+  version = "0.20.9";
   src = fetchgit {
     url = "https://github.com/purescript/spago.git";
-    sha256 = "0lakss2pg5kwbxqsmvzgkcc70l6j40cj9rarhkpcf0kxw98bb5x0";
-    rev = "744bdbbefc538750d4c36888ee53dc5d336314c4";
+    sha256 = "00vdqg7vaw3d9zwh47886lw9fhhlwjagzhaj3aqz4xm92pjavhih";
+    rev = "d16d4914200783fbd820ba89dbdf67270454faf5";
     fetchSubmodules = true;
   };
   isLibrary = true;
diff --git a/pkgs/development/tools/purescript/spago/update.sh b/pkgs/development/tools/purescript/spago/update.sh
index 12595885df3..b97b0fe94a9 100755
--- a/pkgs/development/tools/purescript/spago/update.sh
+++ b/pkgs/development/tools/purescript/spago/update.sh
@@ -33,4 +33,7 @@ cabal2nix --revision "$new_version" "https://github.com/purescript/spago.git" >>
 # TODO: This should ideally also automatically update the docsSearchVersion
 # from pkgs/development/haskell/configuration-nix.nix.
 
-echo "Finished."
+echo
+echo "Finished.  Make sure you run the following commands to confirm Spago builds correctly:"
+echo ' - `nix build -L -f ./. spago`'
+echo ' - `sudo nix build -L -f ./. spago.passthru.tests --option sandbox relaxed`'