upgrade nix dependencies

This updates the flake and since we haven't hacked on this for ages
the overlays aren't needed any more since all of them are now
available as builds.

.github/workflows/haskell-ci.yml

@@ -8,9 +8,9 @@
 #
 # For more information, see https://github.com/haskell-CI/haskell-ci
 #
-# version: 0.17.20231010
+# version: 0.18.1
 #
-# REGENDATA ("0.17.20231010",["--hlint","--hlint-job","9.4.7","--haddock","--apt","elinks tmux vim less notmuch libnotmuch-dev libtalloc-dev","--github-patches",".github/haskell-ci-github.patch","github","purebred.cabal"])
+# REGENDATA ("0.18.1",["--hlint","--hlint-job","9.4.7","--haddock","--apt","elinks tmux vim less notmuch libnotmuch-dev libtalloc-dev","--github-patches",".github/haskell-ci-github.patch","github","purebred.cabal"])
 #
 name: Haskell-CI
 on:
@@ -71,20 +71,20 @@ jobs:
           apt-get install -y --no-install-recommends gnupg ca-certificates dirmngr curl git software-properties-common libtinfo5
           if [ "${{ matrix.setup-method }}" = ghcup ]; then
             mkdir -p "$HOME/.ghcup/bin"
-            curl -sL https://downloads.haskell.org/ghcup/0.1.19.5/x86_64-linux-ghcup-0.1.19.5 > "$HOME/.ghcup/bin/ghcup"
+            curl -sL https://downloads.haskell.org/ghcup/0.1.20.0/x86_64-linux-ghcup-0.1.20.0 > "$HOME/.ghcup/bin/ghcup"
             chmod a+x "$HOME/.ghcup/bin/ghcup"
             "$HOME/.ghcup/bin/ghcup" install ghc "$HCVER" || (cat "$HOME"/.ghcup/logs/*.* && false)
-            "$HOME/.ghcup/bin/ghcup" install cabal 3.10.1.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
+            "$HOME/.ghcup/bin/ghcup" install cabal 3.10.2.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
             apt-get update
             apt-get install -y elinks less libnotmuch-dev libtalloc-dev notmuch tmux vim
           else
             apt-add-repository -y 'ppa:hvr/ghc'
             apt-get update
             apt-get install -y "$HCNAME" elinks less libnotmuch-dev libtalloc-dev notmuch tmux vim
             mkdir -p "$HOME/.ghcup/bin"
-            curl -sL https://downloads.haskell.org/ghcup/0.1.19.5/x86_64-linux-ghcup-0.1.19.5 > "$HOME/.ghcup/bin/ghcup"
+            curl -sL https://downloads.haskell.org/ghcup/0.1.20.0/x86_64-linux-ghcup-0.1.20.0 > "$HOME/.ghcup/bin/ghcup"
             chmod a+x "$HOME/.ghcup/bin/ghcup"
-            "$HOME/.ghcup/bin/ghcup" install cabal 3.10.1.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
+            "$HOME/.ghcup/bin/ghcup" install cabal 3.10.2.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
           fi
         env:
           HCKIND: ${{ matrix.compilerKind }}
@@ -104,13 +104,13 @@ jobs:
             echo "HC=$HC" >> "$GITHUB_ENV"
             echo "HCPKG=$HCPKG" >> "$GITHUB_ENV"
             echo "HADDOCK=$HADDOCK" >> "$GITHUB_ENV"
-            echo "CABAL=$HOME/.ghcup/bin/cabal-3.10.1.0 -vnormal+nowrap" >> "$GITHUB_ENV"
+            echo "CABAL=$HOME/.ghcup/bin/cabal-3.10.2.0 -vnormal+nowrap" >> "$GITHUB_ENV"
           else
             HC=$HCDIR/bin/$HCKIND
             echo "HC=$HC" >> "$GITHUB_ENV"
             echo "HCPKG=$HCDIR/bin/$HCKIND-pkg" >> "$GITHUB_ENV"
             echo "HADDOCK=$HCDIR/bin/haddock" >> "$GITHUB_ENV"
-            echo "CABAL=$HOME/.ghcup/bin/cabal-3.10.1.0 -vnormal+nowrap" >> "$GITHUB_ENV"
+            echo "CABAL=$HOME/.ghcup/bin/cabal-3.10.2.0 -vnormal+nowrap" >> "$GITHUB_ENV"
           fi
 
           HCNUMVER=$(${HC} --numeric-version|perl -ne '/^(\d+)\.(\d+)\.(\d+)(\.(\d+))?$/; print(10000 * $1 + 100 * $2 + ($3 == 0 ? $5 != 1 : $3))')
@@ -162,7 +162,7 @@ jobs:
       - name: cache (tools)
         uses: actions/cache/restore@v3
         with:
-          key: ${{ runner.os }}-${{ matrix.compiler }}-tools-6a3a2bb8
+          key: ${{ runner.os }}-${{ matrix.compiler }}-tools-fa5cc97b
           path: ~/.haskell-ci-tools
       - name: install cabal-plan
         run: |
@@ -183,7 +183,7 @@ jobs:
         uses: actions/cache/save@v3
         if: always()
         with:
-          key: ${{ runner.os }}-${{ matrix.compiler }}-tools-6a3a2bb8
+          key: ${{ runner.os }}-${{ matrix.compiler }}-tools-fa5cc97b
           path: ~/.haskell-ci-tools
       - name: checkout
         uses: actions/checkout@v3

.nix/overlays.nix

@@ -1,21 +1,10 @@
 let
-  haskellCompilerVersion = "ghc924";
+  haskellCompilerVersion = "ghc92";
   haskellPackagesOverlay = self: super: with super.haskell.lib; {
     haskellPackages = super.haskell.packages.${haskellCompilerVersion}.override {
       overrides = hself: hsuper: {
         purebred = hsuper.callPackage ./purebred.nix { };
-        purebred-email = hsuper.callPackage ./purebred-email.nix { };
         purebred-icu = hsuper.callPackage ./purebred-icu.nix { };
-        brick = hsuper.callPackage ./brick.nix { };
-        text-zipper = hsuper.callPackage ./text-zipper.nix { };
-        bimap = hsuper.callPackage ./bimap.nix { };
-        vty = hsuper.callPackage ./vty.nix { };
-        vty-unix = hsuper.callPackage ./vty-unix.nix { };
-        vty-crossplatform = hsuper.callPackage ./vty-crossplatform.nix { };
-        notmuch = hsuper.callPackage ./hsnotmuch.nix {
-          notmuch = self.pkgs.notmuch;
-          talloc = self.pkgs.talloc;
-        };
       };
     };
     make-purebred-with-packages = with-icu: