diff --git a/pix-purenix/flake.lock b/pix-purenix/flake.lock
index ef33d0b..8c01b63 100644
--- a/pix-purenix/flake.lock
+++ b/pix-purenix/flake.lock
@@ -21,27 +21,6 @@
         "type": "github"
       }
     },
-    "deadnix_2": {
-      "inputs": {
-        "fenix": "fenix_2",
-        "naersk": "naersk_2",
-        "nixpkgs": "nixpkgs_23",
-        "utils": "utils_5"
-      },
-      "locked": {
-        "lastModified": 1656370114,
-        "narHash": "sha256-XBbSWeBuF6Ck0jc634yAp2hjPXWM2JyRDPCdK0dh3w4=",
-        "owner": "astro",
-        "repo": "deadnix",
-        "rev": "9f450f7250ad7680cb5f12ce5985cc18496c2d5f",
-        "type": "github"
-      },
-      "original": {
-        "owner": "astro",
-        "repo": "deadnix",
-        "type": "github"
-      }
-    },
     "docs-search": {
       "flake": false,
       "locked": {
@@ -58,22 +37,6 @@
         "type": "github"
       }
     },
-    "docs-search_2": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1675992564,
-        "narHash": "sha256-Tk9VSogFHXtXe9O9vuCEfM/PV/S7plMIO0I++fCZn7U=",
-        "owner": "purs-nix",
-        "repo": "purescript-docs-search",
-        "rev": "35822b1d6ce65b1a07f80dd9e2caf15c3ee83e2c",
-        "type": "github"
-      },
-      "original": {
-        "owner": "purs-nix",
-        "repo": "purescript-docs-search",
-        "type": "github"
-      }
-    },
     "easy-purescript-nix": {
       "flake": false,
       "locked": {
@@ -125,25 +88,6 @@
         "type": "github"
       }
     },
-    "fenix_2": {
-      "inputs": {
-        "nixpkgs": "nixpkgs_21",
-        "rust-analyzer-src": "rust-analyzer-src_2"
-      },
-      "locked": {
-        "lastModified": 1655533500,
-        "narHash": "sha256-qJJmLVoMYfDLywI9MNL7sb0W/GsKQF9HDatdHm1tSl0=",
-        "owner": "nix-community",
-        "repo": "fenix",
-        "rev": "b6630603af13df17d0dd4df8629e9a24e6ba0fbd",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "fenix",
-        "type": "github"
-      }
-    },
     "flake-parts": {
       "inputs": {
         "nixpkgs-lib": [
@@ -281,36 +225,6 @@
         "type": "github"
       }
     },
-    "flake-utils_15": {
-      "locked": {
-        "lastModified": 1618217525,
-        "narHash": "sha256-WGrhVczjXTiswQaoxQ+0PTfbLNeOQM6M36zvLn78AYg=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "c6169a2772643c4a93a0b5ac1c61e296cba68544",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "flake-utils_16": {
-      "locked": {
-        "lastModified": 1618217525,
-        "narHash": "sha256-WGrhVczjXTiswQaoxQ+0PTfbLNeOQM6M36zvLn78AYg=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "c6169a2772643c4a93a0b5ac1c61e296cba68544",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "flake-utils_2": {
       "locked": {
         "lastModified": 1678901627,
@@ -446,21 +360,6 @@
         "type": "github"
       }
     },
-    "get-flake_2": {
-      "locked": {
-        "lastModified": 1644686428,
-        "narHash": "sha256-zkhYsURWFrvEZLkIoBeqFBzSu+cA2u5mo6M8vq9LN7M=",
-        "owner": "ursi",
-        "repo": "get-flake",
-        "rev": "703f15558daa56dfae19d1858bb3046afe68831a",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ursi",
-        "repo": "get-flake",
-        "type": "github"
-      }
-    },
     "make-shell": {
       "locked": {
         "lastModified": 1634940815,
@@ -493,38 +392,6 @@
         "type": "github"
       }
     },
-    "make-shell_3": {
-      "locked": {
-        "lastModified": 1634940815,
-        "narHash": "sha256-P69OmveboXzS+es1vQGS4bt+ckwbeIExqxfGLjGuJqA=",
-        "owner": "ursi",
-        "repo": "nix-make-shell",
-        "rev": "8add91681170924e4d0591b22f294aee3f5516f9",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ursi",
-        "ref": "1",
-        "repo": "nix-make-shell",
-        "type": "github"
-      }
-    },
-    "make-shell_4": {
-      "locked": {
-        "lastModified": 1634940815,
-        "narHash": "sha256-P69OmveboXzS+es1vQGS4bt+ckwbeIExqxfGLjGuJqA=",
-        "owner": "ursi",
-        "repo": "nix-make-shell",
-        "rev": "8add91681170924e4d0591b22f294aee3f5516f9",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ursi",
-        "ref": "1",
-        "repo": "nix-make-shell",
-        "type": "github"
-      }
-    },
     "naersk": {
       "inputs": {
         "nixpkgs": "nixpkgs_17"
@@ -543,24 +410,6 @@
         "type": "github"
       }
     },
-    "naersk_2": {
-      "inputs": {
-        "nixpkgs": "nixpkgs_22"
-      },
-      "locked": {
-        "lastModified": 1655042882,
-        "narHash": "sha256-9BX8Fuez5YJlN7cdPO63InoyBy7dm3VlJkkmTt6fS1A=",
-        "owner": "nix-community",
-        "repo": "naersk",
-        "rev": "cddffb5aa211f50c4b8750adbec0bbbdfb26bb9f",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "naersk",
-        "type": "github"
-      }
-    },
     "nix-build-results": {
       "inputs": {
         "flake-utils": "flake-utils_3",
@@ -818,82 +667,6 @@
         "type": "github"
       }
     },
-    "nixpkgs_20": {
-      "locked": {
-        "lastModified": 1646506091,
-        "narHash": "sha256-sWNAJE2m+HOh1jtXlHcnhxsj6/sXrHgbqVNcVRlveK4=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "3e644bd62489b516292c816f70bf0052c693b3c7",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_21": {
-      "locked": {
-        "lastModified": 1655400192,
-        "narHash": "sha256-49OBVVRgb9H/PSmNT9W61+NRdDbuSJVuDDflwXlaUKU=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "3d7435c638baffaa826b85459df0fff47f12317d",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_22": {
-      "locked": {
-        "lastModified": 1655481042,
-        "narHash": "sha256-XHbcywq2vIQ5CeH1OK3TN793jkiNAAZsSctS1PFgseo=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "103a4c0ae46afa9cf008c30744175315ca38e9f9",
-        "type": "github"
-      },
-      "original": {
-        "id": "nixpkgs",
-        "type": "indirect"
-      }
-    },
-    "nixpkgs_23": {
-      "locked": {
-        "lastModified": 1655481042,
-        "narHash": "sha256-XHbcywq2vIQ5CeH1OK3TN793jkiNAAZsSctS1PFgseo=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "103a4c0ae46afa9cf008c30744175315ca38e9f9",
-        "type": "github"
-      },
-      "original": {
-        "id": "nixpkgs",
-        "type": "indirect"
-      }
-    },
-    "nixpkgs_24": {
-      "locked": {
-        "lastModified": 1656549732,
-        "narHash": "sha256-eILutFZGjfk2bEzfim8S/qyYc//0S1KsCeO+OWbtoR0=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "d3248619647234b5dc74a6921bcdf6dd8323eb22",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "nixpkgs_3": {
       "locked": {
         "lastModified": 1679271670,
@@ -1003,22 +776,6 @@
         "type": "github"
       }
     },
-    "official-package-set-repo": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1686382059,
-        "narHash": "sha256-s94KOuLWAR72Bel3PffkkdKffrXAv5sdzBDu+SAfaCs=",
-        "owner": "purescript",
-        "repo": "package-sets",
-        "rev": "ed59df71f19626e47e0c0a655357d3973e4a5f92",
-        "type": "github"
-      },
-      "original": {
-        "owner": "purescript",
-        "repo": "package-sets",
-        "type": "github"
-      }
-    },
     "package-set-repo": {
       "inputs": {
         "flake-utils": "flake-utils_2",
@@ -1058,21 +815,6 @@
         "type": "github"
       }
     },
-    "parsec_2": {
-      "locked": {
-        "lastModified": 1635533376,
-        "narHash": "sha256-/HrG0UPGnI5VdkhrNrpDiM2+nhdL6lD/bqyGtYv0QDE=",
-        "owner": "nprindle",
-        "repo": "nix-parsec",
-        "rev": "1bf25dd9c5de1257a1c67de3c81c96d05e8beb5e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nprindle",
-        "repo": "nix-parsec",
-        "type": "github"
-      }
-    },
     "ps-tools": {
       "inputs": {
         "deadnix": "deadnix",
@@ -1094,27 +836,6 @@
         "type": "github"
       }
     },
-    "ps-tools_2": {
-      "inputs": {
-        "deadnix": "deadnix_2",
-        "make-shell": "make-shell_4",
-        "nixpkgs": "nixpkgs_24",
-        "utils": "utils_6"
-      },
-      "locked": {
-        "lastModified": 1675987041,
-        "narHash": "sha256-0aHIrngBLXO95SH+PjyTWJ7LWoFdJtx8y6oSln0l5Ak=",
-        "owner": "purs-nix",
-        "repo": "purescript-tools",
-        "rev": "7929148939325f1fed916884c53cad3c0dfa4be7",
-        "type": "github"
-      },
-      "original": {
-        "owner": "purs-nix",
-        "repo": "purescript-tools",
-        "type": "github"
-      }
-    },
     "purenix": {
       "inputs": {
         "flake-utils": "flake-utils",
@@ -1165,22 +886,27 @@
           "purs-nix",
           "nixpkgs"
         ],
-        "official-package-set-repo": "official-package-set-repo",
         "package-set-repo": "package-set-repo",
+        "ps-tools": [
+          "purenix-pkgs",
+          "purs-nix",
+          "ps-tools"
+        ],
         "purenix": "purenix_6",
         "purs-nix": "purs-nix",
         "utils": "utils_4"
       },
       "locked": {
-        "lastModified": 1686845224,
-        "narHash": "sha256-QKTMSBkfiQMOU4CfuHLkc1qoEJFD70pyc8lyaZ+fKQM=",
+        "lastModified": 1689486409,
+        "narHash": "sha256-+pi7RXZ7bW0Q0Q3NMzfvQcZtiXifvP4MQxr3ZZPxEMQ=",
         "owner": "klarkc",
         "repo": "purenix-packages",
-        "rev": "d55443b6c544d1bdcc7983b7778404c44727dfe7",
+        "rev": "726f9796331c5db703ce74e3d42e1cc4eb0ffe65",
         "type": "github"
       },
       "original": {
         "owner": "klarkc",
+        "ref": "add-registry",
         "repo": "purenix-packages",
         "type": "github"
       }
@@ -1412,45 +1138,19 @@
         "type": "github"
       }
     },
-    "purs-nix_2": {
-      "inputs": {
-        "docs-search": "docs-search_2",
-        "get-flake": "get-flake_2",
-        "make-shell": "make-shell_3",
-        "nixpkgs": "nixpkgs_20",
-        "parsec": "parsec_2",
-        "ps-tools": "ps-tools_2",
-        "utils": "utils_7"
-      },
-      "locked": {
-        "lastModified": 1678328044,
-        "narHash": "sha256-c62tsBs89dzy8/y1D6KZbbl8bT+kaXbpZE3gwkbzMmg=",
-        "owner": "purs-nix",
-        "repo": "purs-nix",
-        "rev": "789bc800c854c7ce068e0e66a78362625d3043a1",
-        "type": "github"
-      },
-      "original": {
-        "owner": "purs-nix",
-        "ref": "ps-0.14",
-        "repo": "purs-nix",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
         "nixpkgs": [
           "purenix-pkgs",
           "nixpkgs"
         ],
-        "ps-tools": [
-          "purs-nix",
-          "ps-tools"
-        ],
         "purenix": "purenix",
         "purenix-pkgs": "purenix-pkgs",
-        "purs-nix": "purs-nix_2",
-        "utils": "utils_8"
+        "purs-nix": [
+          "purenix-pkgs",
+          "purs-nix"
+        ],
+        "utils": "utils_5"
       }
     },
     "rust-analyzer-src": {
@@ -1470,23 +1170,6 @@
         "type": "github"
       }
     },
-    "rust-analyzer-src_2": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1655507737,
-        "narHash": "sha256-o+AqNsjL6o2RHh4InZHQVpkmqg570YFJL4Db8mKq+fs=",
-        "owner": "rust-lang",
-        "repo": "rust-analyzer",
-        "rev": "12dd81092e37df28b7a3591cae9675e668927198",
-        "type": "github"
-      },
-      "original": {
-        "owner": "rust-lang",
-        "ref": "nightly",
-        "repo": "rust-analyzer",
-        "type": "github"
-      }
-    },
     "utils": {
       "locked": {
         "lastModified": 1653893745,
@@ -1559,62 +1242,9 @@
       }
     },
     "utils_5": {
-      "locked": {
-        "lastModified": 1653893745,
-        "narHash": "sha256-0jntwV3Z8//YwuOjzhV2sgJJPt+HY6KhU7VZUL0fKZQ=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "1ed9fb1935d260de5fe1c2f7ee0ebaae17ed2fa1",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "utils_6": {
       "inputs": {
         "flake-utils": "flake-utils_14"
       },
-      "locked": {
-        "lastModified": 1656044990,
-        "narHash": "sha256-f01BB7CaOyntOab9XnpH9HD63rGcnu2iyL4M2ubs5F8=",
-        "owner": "ursi",
-        "repo": "flake-utils",
-        "rev": "f53b674a2c90f6202a2f4cd491aba121775490b5",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ursi",
-        "ref": "8",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "utils_7": {
-      "inputs": {
-        "flake-utils": "flake-utils_15"
-      },
-      "locked": {
-        "lastModified": 1656044990,
-        "narHash": "sha256-f01BB7CaOyntOab9XnpH9HD63rGcnu2iyL4M2ubs5F8=",
-        "owner": "ursi",
-        "repo": "flake-utils",
-        "rev": "f53b674a2c90f6202a2f4cd491aba121775490b5",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ursi",
-        "ref": "8",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "utils_8": {
-      "inputs": {
-        "flake-utils": "flake-utils_16"
-      },
       "locked": {
         "lastModified": 1658606827,
         "narHash": "sha256-3kSWTDpV4+uApt/Xd0kv2m7TR1Y6A7SgYUeX86/qYuU=",
diff --git a/pix-purenix/flake.nix b/pix-purenix/flake.nix
index 6fbbde1..d95222f 100644
--- a/pix-purenix/flake.nix
+++ b/pix-purenix/flake.nix
@@ -1,10 +1,9 @@
 {
   inputs = {
-    purenix-pkgs.url = "github:klarkc/purenix-packages";
+    purenix-pkgs.url = "github:klarkc/purenix-packages/add-registry";
     nixpkgs.follows = "purenix-pkgs/nixpkgs";
-    # FIXME purenix-packages is supposed to work with purs 0.15
-    purs-nix.url = "github:purs-nix/purs-nix/ps-0.14";
-    ps-tools.follows = "purs-nix/ps-tools";
+    purs-nix.follows = "purenix-pkgs/purs-nix";
+    #ps-tools.follows = "purenix-pkgs/ps-tools";
     purenix.url = "github:purenix-org/purenix";
     utils.url = "github:ursi/flake-utils";
   };
@@ -17,13 +16,13 @@
     in
     utils.apply-systems
       { inherit inputs systems; }
-      ({ system, pkgs, purenix-pkgs, ps-tools, ... }:
+      ({ system, pkgs, purenix-pkgs, ... }:
         let
           compile = { codegen = "corefn"; };
           purs-nix = inputs.purs-nix {
             inherit system;
             defaults = { inherit compile; };
-            overlays = [ purenix-pkgs ];
+            overlays = [ purenix-pkgs.overlay ];
           };
           ps = purs-nix.purs
             {
@@ -35,6 +34,8 @@
                 [
                   prelude
                 ];
+              # use compatible compiler
+              inherit (purenix-pkgs) purescript;
             };
           prefix = "output";
           purenix-output = pkgs.stdenv.mkDerivation
@@ -42,7 +43,7 @@
               inherit prefix;
               name = "purenix-output";
               src = ps.output { };
-              nativeBuildInputs = with pkgs; [ purenix ];
+              nativeBuildInputs = with pkgs; [ purenix tree ];
               dontInstall = true;
               postBuild = ''
                 mkdir -p $out
@@ -64,8 +65,8 @@
                   [
                     (ps.command { inherit compile; })
                     # optional devShell tools
-                    # ps-tools.for-0_14.purescript-language-server
-                    # ps-tools.for-0_14.purty
+                    # ps-tools.for-0_15.purescript-language-server
+                    # ps-tools.for-0_15.purty
                     # purs-nix.esbuild
                     # purs-nix.purescript
                     # nodejs