Loosened bounds and got nix build working

awsspendsummary.cabal

@@ -24,31 +24,31 @@ common deps
 library
     import:           deps
     build-depends:
-        base ^>=4.18.2.1
-      , amazonka
-      , amazonka-core
-      , amazonka-s3
-      , ansi-terminal
-      , bytestring
-      , cassava
-      , conduit
-      , containers
-      , lens
-      , text
-      , time
-      , timelens
-      , vector
-      , zlib
+        base >=4.18.2.1 && <4.19
+      , amazonka >=2.0 && <2.1
+      , amazonka-core >=2.0 && <2.1
+      , amazonka-s3 >= 2.0 && <2.1
+      , ansi-terminal >= 1.0.2 && <1.2
+      , bytestring >=0.11.5.3 && <0.13
+      , cassava >=0.5.3.2 && <0.6
+      , conduit >=1.3.5 && <1.4
+      , containers >=0.6.7 && <0.7
+      , lens >=5.2.3 && <5.4
+      , text >=2.0.2 && < 2.2
+      , time >=1.12.2 && < 1.13
+      , timelens >=0.2.0.2 && <0.3
+      , vector >=0.13.1.0 && <0.14
+      , zlib >=0.6.3 && <0.8
     exposed-modules:  AwsSpendSummary
     hs-source-dirs:   src
 
 executable awsspendsummary
     import:           deps
     main-is:          Main.hs
     build-depends:
-        base ^>=4.18.2.1
+        base >=4.18.2.1 && <4.19
       , awsspendsummary
-      , text
-      , optparse-applicative
+      , text >=2.0.2 && < 2.2
+      , optparse-applicative >=0.18.1.0 && < 0.19
     hs-source-dirs:   app
 

flake.nix

@@ -1,14 +1,14 @@
 {
   description = "awsspendsummary";
 
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
 
   outputs = { self, nixpkgs }:
 
     let pkgs = nixpkgs.legacyPackages.x86_64-linux;
     in {
 
-      packages.x86_64-linux.default =
+      packages.x86_64-linux.default = (pkgs.haskell.lib.overrideCabal (
 
         pkgs.haskellPackages.developPackage {
             root = ./.;
@@ -18,7 +18,12 @@
                   hlint
                   haskell-language-server
                 ]);
-        };
+              }
+      ) {
+
+      }).overrideAttrs(old: {
+        buildInputs = old.buildInputs ++ [ pkgs.zlib ];
+      });
     };
 }