diff --git a/stack810.yaml.old b/stack810.yaml.old
deleted file mode 100644
index b4a33d725..000000000
--- a/stack810.yaml.old
+++ /dev/null
@@ -1,66 +0,0 @@
-# stack build plan using GHC 8.10.7
-# Note hledger now officially requires GHC 9.6+;
-# this is here as a reference in case you are trying to build with older GHC and stack.
-
-resolver: lts-18.28
-
-packages:
-- hledger-lib
-- hledger
-- hledger-ui
-- hledger-web
-
-# I give up, go with this for now
-allow-newer: true
-
-extra-deps:
-- safe-0.3.21
-
-# for hledger-lib:
-- doctest-0.20.0
-- ansi-terminal-0.11.4
-- extra-1.8
-- terminal-size-0.3.4
-- text-ansi-0.2.1
-- text-builder-0.6.7
-- text-builder-dev-0.3.3.2
-- isomorphism-class-0.1.0.7
-- encoding-0.10
-# for hledger:
-# silence a warning
-- wizards-1.0.3@rev:3
-# for hledger-ui:
-- brick-2.3.1
-- bimap-0.5.0
-- fsnotify-0.4.2.0
-- hfsevents-0.1.8
-- text-zipper-0.13
-- vty-6.2
-- vty-crossplatform-0.4.0.0
-- vty-unix-0.2.0.0
-- vty-windows-0.2.0.2
-# for hledger-web:
-# for Shake.hs:
-
-nix:
-  pure: false
-  packages: [perl gmp ncurses zlib]
-
-# ghc-options:
-#   "$locals": -fplugin Debug.Breakpoint
-
-# for precise profiling, per https://www.tweag.io/posts/2020-01-30-haskell-profiling.html:
-# apply-ghc-options: everything
-# rebuild-ghc-options: true
-# stack build --profile --ghc-options="-fno-prof-auto"
-
-# tell GHC to write hie files, eg for weeder. Rumoured to be slow.
-# ghc-options:
-#   "$locals": -fwrite-ide-info
-
-# ghc-options:
-#   "$locals": -ddump-timings
-#  "$targets": -Werror
-#  "$everything": -O2
-#  some-package: -DSOME_CPP_FLAG
-  
diff --git a/stack90.yaml.old b/stack90.yaml.old
deleted file mode 100644
index fabf76c23..000000000
--- a/stack90.yaml.old
+++ /dev/null
@@ -1,61 +0,0 @@
-# stack build plan using GHC 9.0.2
-# Note hledger now officially requires GHC 9.6+;
-# this is here as a reference in case you are trying to build with older GHC and stack.
-
-resolver: lts-19.33
-
-# for https://gitlab.haskell.org/ghc/ghc/-/issues/20592 on mac m1 (adjust path if needed)
-extra-include-dirs:
-- /Library/Developer/CommandLineTools/SDKs/MacOSX12.1.sdk/usr/include/ffi
-
-packages:
-- hledger-lib
-- hledger
-- hledger-ui
-- hledger-web
-
-extra-deps:
-- megaparsec-9.3.0
-- safe-0.3.21
-# for hledger-lib:
-- ansi-terminal-0.11.4
-- text-ansi-0.2.1
-- text-builder-0.6.7
-- text-builder-dev-0.3.3.2
-- isomorphism-class-0.1.0.7
-- encoding-0.10
-# for hledger:
-# for hledger-ui:
-- bimap-0.5.0
-- brick-2.3.1
-- fsnotify-0.4.2.0
-- hfsevents-0.1.8
-- text-zipper-0.13
-- vty-6.2
-- vty-crossplatform-0.4.0.0
-- vty-unix-0.2.0.0
-- vty-windows-0.2.0.2
-# for hledger-web:
-# for Shake.hs:
-
-nix:
-  pure: false
-  packages: [perl gmp ncurses zlib]
-
-# ghc-options:
-#   "$locals": -fplugin Debug.Breakpoint
-
-# for precise profiling, per https://www.tweag.io/posts/2020-01-30-haskell-profiling.html:
-# apply-ghc-options: everything
-# rebuild-ghc-options: true
-# stack build --profile --ghc-options="-fno-prof-auto"
-
-# tell GHC to write hie files, eg for weeder. Rumoured to be slow.
-# ghc-options:
-#   "$locals": -fwrite-ide-info
-
-# ghc-options:
-#   "$locals": -ddump-timings
-#  "$targets": -Werror
-#  "$everything": -O2
-#  some-package: -DSOME_CPP_FLAG
diff --git a/stack92.yaml.old b/stack92.yaml.old
deleted file mode 100644
index 6185fd0f4..000000000
--- a/stack92.yaml.old
+++ /dev/null
@@ -1,52 +0,0 @@
-# stack build plan using GHC 9.2.8
-# Note hledger now officially requires GHC 9.6+;
-# this is here as a reference in case you are trying to build with older GHC and stack.
-
-resolver:  lts-20.26
-
-packages:
-- hledger-lib
-- hledger
-- hledger-ui
-- hledger-web
-
-extra-deps:
-- megaparsec-9.3.0
-- safe-0.3.21
-# for hledger-lib:
-- encoding-0.10
-- hashtables-1.4.2
-# for hledger:
-# for hledger-ui:
-- brick-2.3.1
-- fsnotify-0.4.2.0
-- hfsevents-0.1.8
-- text-zipper-0.13
-- vty-6.2
-- vty-crossplatform-0.4.0.0
-- vty-unix-0.2.0.0
-- vty-windows-0.2.0.2
-# for hledger-web:
-# for Shake.hs:
-
-nix:
-  pure: false
-  packages: [perl gmp ncurses zlib]
-
-# ghc-options:
-#   "$locals": -fplugin Debug.Breakpoint
-
-# # for precise profiling, per https://www.tweag.io/posts/2020-01-30-haskell-profiling.html:
-# # apply-ghc-options: everything
-# # rebuild-ghc-options: true
-# # stack build --profile --ghc-options="-fno-prof-auto"
-
-# # tell GHC to write hie files, eg for weeder. Rumoured to be slow.
-# # ghc-options:
-# #   "$locals": -fwrite-ide-info
-
-# # ghc-options:
-# #   "$locals": -ddump-timings
-# #  "$targets": -Werror
-# #  "$everything": -O2
-# #  some-package: -DSOME_CPP_FLAG
diff --git a/stack94.yaml.old b/stack94.yaml.old
deleted file mode 100644
index dce051933..000000000
--- a/stack94.yaml.old
+++ /dev/null
@@ -1,46 +0,0 @@
-# stack build plan using GHC 9.4.8
-# Note hledger now officially requires GHC 9.6+;
-# this is here as a reference in case you are trying to build with older GHC and stack.
-
-resolver: lts-21.25
-
-packages:
-- hledger-lib
-- hledger
-- hledger-ui
-- hledger-web
-
-extra-deps:
-- brick-2.3.1
-- encoding-0.10
-- hashtables-1.4.2
-- fsnotify-0.4.2.0
-- hfsevents-0.1.8
-- safe-0.3.21
-- vty-6.2
-- vty-crossplatform-0.4.0.0
-- vty-unix-0.2.0.0
-- vty-windows-0.2.0.2
-
-nix:
-  pure: false
-  packages: [perl gmp ncurses zlib]
-
-
-# ghc-options:
-#   "$locals": -fplugin Debug.Breakpoint
-
-# # for precise profiling, per https://www.tweag.io/posts/2020-01-30-haskell-profiling.html:
-# # apply-ghc-options: everything
-# # rebuild-ghc-options: true
-# # stack build --profile --ghc-options="-fno-prof-auto"
-
-# # tell GHC to write hie files, eg for weeder. Rumoured to be slow.
-# # ghc-options:
-# #   "$locals": -fwrite-ide-info
-
-# # ghc-options:
-# #   "$locals": -ddump-timings
-# #  "$targets": -Werror
-# #  "$everything": -O2
-# #  some-package: -DSOME_CPP_FLAG