nix derivation

.gitignore

@@ -1,3 +1,4 @@
 .stack-work/
 *~
-database/*
+database/*
+result

flake.nix

@@ -29,14 +29,40 @@
           with haskell.packages."ghc927"; [ ghc haskell-language-server ]
         )
       );
+      libPath = pkgs.lib.makeLibraryPath buildInputs;
+       #oms = pkgs.haskell.lib.buildStackProject {
+       # ghc = pkgs.haskell.packages.ghc927.ghc;
+       # inherit buildInputs;
+       # inherit name;
+       # dontUnpack = true;
+      #};
+      oms = pkgs.stdenv.mkDerivation {
+        inherit buildInputs;
+        inherit name;
+        pname = name;
+        src = ./.;
+        # dontUnpack = true;
+        buildPhase = ''
+          HOME=$out
+          LD_LIBRARY_PATH=${libPath}
+          mkdir -p $HOME/.stack
+          stack build --verbose
+        '';
+        installPhase = ''
+          mv .stack-work/install/${system}/*/*/bin/${name}-exe $out
+          echo "moved"
+        '';
+      };
     in {
 
-    packages.${system}.${name} = nixpkgs.legacyPackages.${system}.${name};
-    packages.${system}.default = self.packages.${system}.${name};
+      packages.${system} = {
+        ${name} = oms; # nixpkgs.legacyPackages.${system}.${name};
+        default = self.packages.${system}.${name};
+      };
 
     devShells.${system}.default = pkgs.mkShell {
       buildInputs = buildInputs;
-      LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath buildInputs;
+      LD_LIBRARY_PATH = libPath;
       shellHook = builtins.readFile ./mkDB.sh;
     };
   };