try lts-12.0

diff --git a/stack-12.yaml b/stack-12.yaml
new file mode 100644 (file)
index 0000000..34252b7
--- /dev/null
+++ b/stack-12.yaml
@@ -0,0 +1,7 @@
+extra-deps:
+- magic-1.1
+resolver: lts-12.0
+flags: {}
+extra-package-dbs: []
+packages:
+- '.'