diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..8d68527
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1681202837,
+        "narHash": "sha256-H+Rh19JDwRtpVPAWp64F+rlEtxUWBAQW28eAi3SRSzg=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "cfacdce06f30d2b68473a46042957675eebb3401",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1683408522,
+        "narHash": "sha256-9kcPh6Uxo17a3kK3XCHhcWiV1Yu1kYj22RHiymUhMkU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "897876e4c484f1e8f92009fd11b7d988a121a4e7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..f5ab8ba
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,52 @@
+{
+  description = "Opt-in Stack Flake";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+
+        hPkgs =
+          pkgs.haskell.packages."ghc927"; # need to match Stackage LTS version from stack.yaml resolver
+
+        myDevTools = [
+          hPkgs.ghc # GHC compiler in the desired version (will be available on PATH)
+          stack-wrapped
+          pkgs.zlib # External C library needed by some Haskell packages
+          pkgs.secp256k1
+          pkgs.libff
+        ];
+
+        stack-wrapped = pkgs.symlinkJoin {
+          name = "stack"; # will be available as the usual `stack` in terminal
+          paths = [ pkgs.stack ];
+          buildInputs = [ pkgs.makeWrapper ];
+          postBuild = ''
+            wrapProgram $out/bin/stack \
+              --add-flags "\
+                --no-nix \
+                --system-ghc \
+                --no-install-ghc \
+              "
+          '';
+        };
+      in {
+        devShells.default = pkgs.mkShell {
+          buildInputs = myDevTools;
+
+          # Make external Nix c libraries like zlib known to GHC, like
+          # pkgs.haskell.lib.buildStackProject does
+          LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath myDevTools;
+
+          shellHook = ''
+            if test -f "REPO_UNINITIALIZED.sh"; then
+              chmod +x REPO_UNINITIALIZED.sh
+              ./REPO_UNINITIALIZED.sh
+              rm REPO_UNINITIALIZED.sh
+            fi
+          '';
+        };
+      });
+}
diff --git a/stack.yaml b/stack.yaml
index 1e33dd9..de794bc 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -75,7 +75,7 @@ allow-newer: true
 #
 # Override the architecture used by stack, especially useful on Windows
 # Change to x86_64 for Intel and aarch64 for ARM/apple silicon
-arch: x86_64
+arch: aarch64
 #
 # Extra directories used by stack for building
 # extra-include-dirs: [/path/to/dir]
@@ -86,7 +86,3 @@ arch: x86_64
 #
 ghc-options:
   "$locals": -fwarn-incomplete-patterns
-
-nix:
-  enable: true
-  packages: [libff, secp256k1, zlib]