diff --git a/flake.nix b/flake.nix
index 519c1ba3..0f633040 100644
--- a/flake.nix
+++ b/flake.nix
@@ -15,11 +15,16 @@
       exportPackages = import ./lib/exportPackages.nix fupArgs;
       genPkgOverlay = import ./lib/genPkgOverlay.nix;
       internal-functions = import ./lib/internal-functions.nix;
-      overlay = import ./lib/overlay.nix;
+      overlay = final: prev: {
+        __dontExport = true;
+        fup-repl = final.callPackage ./lib/fup-repl.nix { };
+      };
+
     in
     rec {
       inherit overlay;
 
+      blueprints.fup-repl = ./lib/fup-repl.nix;
       nixosModules.autoGenFromInputs = import ./lib/options.nix;
       darwinModules.autoGenFromInputs = import ./lib/options.nix;
 
diff --git a/lib/fup-repl.nix b/lib/fup-repl.nix
new file mode 100644
index 00000000..7db79c2e
--- /dev/null
+++ b/lib/fup-repl.nix
@@ -0,0 +1,20 @@
+{ writeShellScriptBin, coreutils, gnused }:
+let
+  example = command: desc: ''\n\u001b[33m ${command}\u001b[0m - ${desc}'';
+in
+writeShellScriptBin "repl" ''
+  case "$1" in
+    "-h"|"--help"|"help")
+      printf "%b\n\e[4mUsage\e[0m: \
+        ${example "repl" "Loads system flake if available."} \
+        ${example "repl /path/to/flake.nix" "Loads specified flake."}\n"
+    ;;
+    *)
+      if [ -z "$1" ]; then
+        nix repl ${./repl.nix}
+      else
+        nix repl --arg flakePath $(${coreutils}/bin/readlink -f $1 | ${gnused}/bin/sed 's|/flake.nix||') ${./repl.nix}
+      fi
+    ;;
+  esac
+''
diff --git a/lib/overlay.nix b/lib/overlay.nix
deleted file mode 100644
index fedbfd77..00000000
--- a/lib/overlay.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-final: prev:
-let
-  example = command: desc: ''\n\u001b[33m ${command}\u001b[0m - ${desc}'';
-in
-{
-  __dontExport = true;
-
-  fup-repl = final.writeShellScriptBin "repl" ''
-    case "$1" in
-      "-h"|"--help"|"help")
-        printf "%b\n\e[4mUsage\e[0m: \
-          ${example "repl" "Loads system flake if available."} \
-          ${example "repl /path/to/flake.nix" "Loads specified flake."}\n"
-      ;;
-      *)
-        if [ -z "$1" ]; then
-          nix repl ${./repl.nix}
-        else
-          nix repl --arg flakePath $(${final.coreutils}/bin/readlink -f $1 | ${final.gnused}/bin/sed 's|/flake.nix||') ${./repl.nix}
-        fi
-      ;;
-    esac
-  '';
-}
-