diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f9a6d50a..4110aebb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -44,6 +44,7 @@ jobs:
           - stack-yaml: 'stack-8.8.yaml'
           - stack-yaml: 'stack.yaml'
           - stack-yaml: 'stack-9.0.yaml'
+          - stack-yaml: 'stack-9.2.yaml'
 
     steps:
       - uses: actions/checkout@v2
diff --git a/stack-9.0.yaml b/stack-9.0.yaml
index b547be2b..33fa69af 100644
--- a/stack-9.0.yaml
+++ b/stack-9.0.yaml
@@ -1,6 +1,4 @@
-# the GHC version of this resolver needs to match the GHC version in Dockerfile
-resolver: lts-19.10
-#allow-newer: true
+resolver: lts-19.23 # GHC 9.0.2
 
 flags: {}
 packages:
@@ -21,19 +19,13 @@ packages:
     - ./ihaskell-display/ihaskell-widgets
 
 extra-deps:
-- Chart-cairo-1.9.3@sha256:893d9da563b54350da20f258fe75e894f71ba5297dacc6b531407e0abc8988b4,924
-- diagrams-cairo-1.4.2@sha256:a9586a56c90fca258988ad0d1eec122ed62dadbfdd8a4ef022d02c1de0268cdd,3810
+- Chart-cairo-1.9.3
+- diagrams-cairo-1.4.2
 - cairo-0.13.8.2
 - pango-0.13.8.2
 - glib-0.13.8.2
-- gtk2hs-buildtools-0.13.8.3
 - plot-0.2.3.11
-# - static-canvas-0.2.0.3
 - statestack-0.3
-- dual-tree-0.2.3.0
-- monoid-extras-0.6
-- svg-builder-0.1.1
-- force-layout-0.4.0.6
 
 ghc-options:
   # Eventually we want "$locals": -Wall -Wpartial-fields -Werror
diff --git a/stack-9.2.yaml b/stack-9.2.yaml
index 1eee1344..2ed3dd9a 100644
--- a/stack-9.2.yaml
+++ b/stack-9.2.yaml
@@ -25,7 +25,7 @@ ghc-options:
   # ihaskell-widgets: -Wall -Wpartial-fields -Werror
 
 nix:
-  enable: true
+  enable: false
   packages:
     - blas
     - cairo