diff --git a/extras/build.nix b/extras/build.nix
index 95f076dd..f120d8b4 100644
--- a/extras/build.nix
+++ b/extras/build.nix
@@ -23,7 +23,7 @@
 
     # Makes a per system `lbf-nix` option.
     perSystem = flake-parts-lib.mkPerSystemOption
-      ({ pkgs, config, pkgsForCtl, pkgsForRust, ... }: {
+      ({ pkgs, config, pkgsForRust, ... }: {
 
         options.lbf-nix = lib.mkOption {
           type = lib.types.anything;
@@ -40,9 +40,6 @@
 
           lbf-nix = {
             # NOTE(bladyjoker): If you need to add a function the export externally and use internally via config.lbf-nix, add it here.
-
-            purescriptFlake = import ./flake-purescript.nix pkgsForCtl;
-
             rustFlake = import ./flake-rust.nix pkgsForRust;
           };
 
diff --git a/extras/flake-purescript.nix b/extras/flake-purescript.nix
deleted file mode 100644
index 29a9a97a..00000000
--- a/extras/flake-purescript.nix
+++ /dev/null
@@ -1,42 +0,0 @@
-pkgs: pursProjOpts:
-let
-  mkFlake = projectName: purs:
-    {
-      packages = {
-        "purescript:${projectName}:src" = pkgs.stdenv.mkDerivation {
-          name = projectName;
-          inherit (pursProjOpts) src;
-          phases = "installPhase";
-          installPhase = "ln -s $src $out";
-        };
-        "purescript:${projectName}:lib" = purs.compiled;
-        "purescript:${projectName}:node-modules" = purs.nodeModules;
-        "purescript:${projectName}:webpack-web" = purs.bundlePursProjectWebpack {
-          main = "Test.Main";
-          entrypoint = "app/index.js";
-          bundledModuleName = "dist/output.js";
-        };
-        "purescript:${projectName}:esbuild-web" = purs.bundlePursProjectEsbuild {
-          main = "Test.Main";
-          browserRuntime = true;
-        };
-        "purescript:${projectName}:esbuild-nodejs" = purs.bundlePursProjectEsbuild {
-          main = "Test.Main";
-          browserRuntime = false;
-        };
-        # FIX(https://github.com/Plutonomicon/cardano-transaction-lib/issues/1578)
-        # "purescript:${projectName}:docs" = purs.buildPursDocs { };
-        # "purescript:${projectName}:docs-search" = purs.buildSearchablePursDocs { };
-      };
-
-      checks = {
-        "purescript:${projectName}:check-nodejs" = purs.runPursTest {
-          testMain = "Test.Main";
-          buildInputs = if pursProjOpts ? "shell" then if pursProjOpts.shell ? "packages" then pursProjOpts.shell.packages else [ ] else [ ];
-        };
-      };
-
-      inherit (purs) devShell;
-    };
-in
-mkFlake pursProjOpts.projectName (pkgs.purescriptProject pursProjOpts)
diff --git a/flake.lock b/flake.lock
index 5459b516..16b3db8f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -13752,16 +13752,15 @@
         "rust-overlay": "rust-overlay_11"
       },
       "locked": {
-        "lastModified": 1706892391,
-        "narHash": "sha256-1Jamt1cCFcTXraFKl3nSLTO4x++nOw/J/0gDg0pZWJY=",
+        "lastModified": 1706927656,
+        "narHash": "sha256-WaPSrksAT5o1peV+UKJ23czBg2a7BBtINH89edsWQik=",
         "owner": "mlabs-haskell",
         "repo": "flake-lang.nix",
-        "rev": "c902020a4ff058e42f58e04373b5ac78cab2b801",
+        "rev": "116a01d925c9cf85f126b9ae4adf434f6010e473",
         "type": "github"
       },
       "original": {
         "owner": "mlabs-haskell",
-        "ref": "bladyjoker/migrate-haskellFlake",
         "repo": "flake-lang.nix",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 8f0a1ce1..28903085 100644
--- a/flake.nix
+++ b/flake.nix
@@ -4,7 +4,7 @@
     nixpkgs.url = "github:NixOS/nixpkgs";
 
     # flake-lang.nix
-    flake-lang.url = "github:mlabs-haskell/flake-lang.nix?ref=bladyjoker/migrate-haskellFlake";
+    flake-lang.url = "github:mlabs-haskell/flake-lang.nix";
 
     # Nix
 
diff --git a/runtimes/purescript/lbr-plutus/build.nix b/runtimes/purescript/lbr-plutus/build.nix
index 7d8dd2cd..5f3f3821 100644
--- a/runtimes/purescript/lbr-plutus/build.nix
+++ b/runtimes/purescript/lbr-plutus/build.nix
@@ -1,9 +1,9 @@
-_:
+{ inputs, ... }:
 {
-  perSystem = { pkgs, config, ... }:
+  perSystem = { pkgs, config, system, ... }:
 
     let
-      pursFlake = config.lbf-nix.purescriptFlake {
+      pursFlake = inputs.flake-lang.lib.${system}.purescriptFlake {
         inherit pkgs;
         src = ./.;
         projectName = "lbr-plutus";
diff --git a/runtimes/purescript/lbr-prelude/build.nix b/runtimes/purescript/lbr-prelude/build.nix
index 4496011c..dff49cd5 100644
--- a/runtimes/purescript/lbr-prelude/build.nix
+++ b/runtimes/purescript/lbr-prelude/build.nix
@@ -1,9 +1,9 @@
-_:
+{ inputs, ... }:
 {
-  perSystem = { pkgs, config, ... }:
+  perSystem = { pkgs, config, system, ... }:
 
     let
-      pursFlake = config.lbf-nix.purescriptFlake {
+      pursFlake = inputs.flake-lang.lib.${system}.purescriptFlake {
         inherit pkgs;
         src = ./.;
         projectName = "lbr-prelude";
diff --git a/testsuites/lbt-plutus/lbt-plutus-purescript/build.nix b/testsuites/lbt-plutus/lbt-plutus-purescript/build.nix
index 2a60b83c..7b2c160e 100644
--- a/testsuites/lbt-plutus/lbt-plutus-purescript/build.nix
+++ b/testsuites/lbt-plutus/lbt-plutus-purescript/build.nix
@@ -1,9 +1,9 @@
-_:
+{ inputs, ... }:
 {
-  perSystem = { pkgs, config, ... }:
+  perSystem = { pkgs, config, system, ... }:
 
     let
-      pursFlake = config.lbf-nix.purescriptFlake {
+      pursFlake = inputs.flake-lang.lib.${system}.purescriptFlake {
         src = ./.;
         projectName = "lbt-plutus";
         strictComp = true;
diff --git a/testsuites/lbt-prelude/lbt-prelude-purescript/build.nix b/testsuites/lbt-prelude/lbt-prelude-purescript/build.nix
index a2011321..5a0388fa 100644
--- a/testsuites/lbt-prelude/lbt-prelude-purescript/build.nix
+++ b/testsuites/lbt-prelude/lbt-prelude-purescript/build.nix
@@ -1,9 +1,9 @@
-_:
+{ inputs, ... }:
 {
-  perSystem = { pkgs, config, ... }:
+  perSystem = { pkgs, config, system, ... }:
 
     let
-      pursFlake = config.lbf-nix.purescriptFlake {
+      pursFlake = inputs.flake-lang.lib.${system}.purescriptFlake {
         src = ./.;
         projectName = "lbt-prelude";
         strictComp = true;