diff --git a/flake.lock b/flake.lock
index e3d6599a557e4f2cf8358aaab065e91fedf08cd6..a6538cbc8d3dc5423775b4c2d736c927b702d5bc 100644
--- a/flake.lock
+++ b/flake.lock
@@ -132,39 +132,6 @@
         "type": "github"
       }
     },
-    "foundation": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1653349151,
-        "narHash": "sha256-W19+xRxbJ3weRuayuXhkwWX6R6cil2dKZSkMmwH+ox8=",
-        "owner": "parsonsmatt",
-        "repo": "foundation",
-        "rev": "8166c31a115521f2ce5fabfba8247982979eeebf",
-        "type": "github"
-      },
-      "original": {
-        "owner": "parsonsmatt",
-        "repo": "foundation",
-        "type": "github"
-      }
-    },
-    "ghc-tcplugins-extra": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1657981318,
-        "narHash": "sha256-PRHBLEWy93hsxh805w5spq1+EZ2h6LQq+fyrF9GF6jg=",
-        "owner": "clash-lang",
-        "repo": "ghc-tcplugins-extra",
-        "rev": "8852d8ad94effa39e3400a243b21ae444df6c69e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "clash-lang",
-        "repo": "ghc-tcplugins-extra",
-        "rev": "8852d8ad94effa39e3400a243b21ae444df6c69e",
-        "type": "github"
-      }
-    },
     "haskell-flake": {
       "locked": {
         "lastModified": 1661726764,
@@ -273,8 +240,6 @@
         "double-conversion": "double-conversion",
         "flake-parts": "flake-parts",
         "flake-utils": "flake-utils",
-        "foundation": "foundation",
-        "ghc-tcplugins-extra": "ghc-tcplugins-extra",
         "haskell-flake": "haskell-flake",
         "integer-logarithms": "integer-logarithms",
         "lint-utils": "lint-utils",
diff --git a/flake.nix b/flake.nix
index 48157ae00b0363ae86a16ba822040e76e34f7355..d54fb25ad60b9b7529b838b8ae0e7bca98caeef7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -22,10 +22,6 @@
     };
     flake-parts.url = "github:hercules-ci/flake-parts";
     flake-parts.inputs.nixpkgs.follows = "nixpkgs";
-    foundation = {
-      url = "github:parsonsmatt/foundation";
-      flake = false;
-    };
     lint-utils.url = "git+https://gitlab.homotopic.tech/nix/lint-utils";
     haskell-flake.url = "github:srid/haskell-flake";
     integer-logarithms = {
diff --git a/overlay.nix b/overlay.nix
index 84b36057cbf73655812232d9ced0ba3cfbd2e2df..e9c130d48180ef1046fc16d28d9370ac899d0452 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -81,7 +81,7 @@ final: prev: with pkgs.haskell.lib; {
 
   foldl = dontCheck (prev.foldl);
 
-  foundation = doJailbreak (prev.callCabal2nix "foundation" (inputs.foundation + /foundation) { });
+  foundation = prev.callHackage "foundation" "0.0.29" { };
 
   generic-lens-lite = doJailbreak prev.generic-lens-lite;