diff --git a/stack8.4.yaml b/stack8.4.yaml
deleted file mode 100644
index 903415eea..000000000
--- a/stack8.4.yaml
+++ /dev/null
@@ -1,30 +0,0 @@
-# stack build plan using GHC 8.4.3
-
-nix:
-  pure: false
-  packages: [perl gmp ncurses zlib]
-
-resolver: lts-12.26
-
-packages:
-- hledger-lib
-- hledger
-- hledger-ui
-- hledger-web
-
-extra-deps:
-- ansi-terminal-0.10.3
-- cassava-megaparsec-2.0.0
-- config-ini-0.2.3.0
-- doctest-0.16.3
-- megaparsec-7.0.2
-- tasty-1.2.3
-- tasty-hunit-0.10.0.2
-- ansi-wl-pprint-0.6.9
-- wai-handler-launch-3.0.3.1
-- streaming-commons-0.2.1.2
-- network-2.7.0.0
-- math-functions-0.3.3.0
-- pretty-simple-4.0.0.0
-- prettyprinter-1.7.0
-- prettyprinter-ansi-terminal-1.1.2