diff --git a/ci/release/aws/ensure.sh b/ci/release/aws/ensure.sh
index c850e4315..801261a0f 100755
--- a/ci/release/aws/ensure.sh
+++ b/ci/release/aws/ensure.sh
@@ -457,10 +457,14 @@ New-ItemProperty -Path "HKLM:\SOFTWARE\OpenSSH" -Name DefaultShell -Value "C:\Wi
 Restart-Computer
 EOF
 
-# Use the following to get a pure MSYS2 shell:
-#   ssh -t "$CI_D2_WINDOWS_AMD64" 'C:\msys64\msys2_shell.cmd -defterm -here -no-start -mingw64'
-# Use the following to run a command in a pure MSYS2 shell:
+# To run a POSIX script:
+#   ssh "$CI_D2_WINDOWS_AMD64" sh -s -- <<EOF
+#   which wix
+#   EOF
+# To run a command in a pure MSYS2 shell:
 #   ssh "$CI_D2_WINDOWS_AMD64" 'C:\msys64\msys2_shell.cmd -defterm -here -no-start -mingw64 -c "echo hi"'
+# To run a pure MSYS2 shell:
+#   ssh -t "$CI_D2_WINDOWS_AMD64" 'C:\msys64\msys2_shell.cmd -defterm -here -no-start -mingw64'
 
 # In case MSYS2 improves in the future and allows for noninteractive commands the
 # following will set the OpenSSH shell to MSYS2 instead of PowerShell.