Github CI shell workarounds.

Author: kquick

_eng_/dev.eng

@@ -24,21 +24,16 @@ dev
      Uses nix to build with old GHC versions
        in dir = {TopDir}
        exec =
-         declare -a ghcvers=(810 90 92)
-         nix build --no-link  --override-input nixpkgs github:nixos/nixpkgs/25.05 ${ghcvers[@]/#/.#tasty-sugar.ghc}
+         nix build --no-link  --override-input nixpkgs github:nixos/nixpkgs/25.05 $(for X in 810 90 92; do echo .#tasty-sugar.ghc$X; done)
          nix build --no-link .#tasty-sugar.ghc94
    nixbuild:recent
      Uses nix to build with recent GHC versions
        in dir = {TopDir}
-       exec =
-         declare -a ghcvers=(96 98)
-         nix build --no-link ${ghcvers[@]/#/.#tasty-sugar.ghc}
+       exec = nix build --no-link .#tasty-sugar.ghc96 .#tasty-sugar.ghc98
    nixbuild
      Uses nix to build with current GHC versions
        in dir = {TopDir}
-       exec =
-         declare -a ghcvers=(910 912)
-         nix build --no-link ${ghcvers[@]/#/.#tasty-sugar.ghc}
+       exec = nix build --no-link .#tasty-sugar.ghc910 .#tasty-sugar.ghc912
    nixbuild:all =
      Uses nix to build with all supported GHC versions =
        in dir = {TopDir}