diff --git a/flake.lock b/flake.lock
index 1a268107dc..5361790461 100644
--- a/flake.lock
+++ b/flake.lock
@@ -49,11 +49,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1624977608,
-        "narHash": "sha256-i/QZI5qM4eYw2wWGd/OjruBx53FqUPq+sdAWmyIQ0ws=",
+        "lastModified": 1626764163,
+        "narHash": "sha256-TB+mtRpwn6pnoUXjBvJPIgHKkwLtjzFji4tkANlZWJQ=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "db6e089456cdddcd7e2c1d8dac37a505c797e8fa",
+        "rev": "1441fa74d213d7cc120d9d7d49e540c1fc59bc58",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index ea8cdc3c65..eca9dd5c5e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -71,10 +71,6 @@
           tweaks = hself: hsuper:
             with haskell.lib; {
 
-              hls-tactics-plugin = hsuper.hls-tactics-plugin.override {
-                refinery = hself.refinery_0_3_0_0;
-              };
-
               hiedb = hself.callCabal2nix "hiedb"
                 (builtins.fetchTarball {
                   url =
@@ -83,6 +79,29 @@
                     "13jz8c46zfpf54ya2wsv4akhn0wcfc6qjazqsjfir5gpvsi7v8xr";
                 }) { };
 
+              implicit-hie = hself.callCabal2nix "implicit-hie"
+                (builtins.fetchTarball {
+                  url =
+                    "https://hackage.haskell.org/package/implicit-hie-0.1.2.6/implicit-hie-0.1.2.6.tar.gz";
+                  sha256 =
+                    "067bmw5b9qg55ggklbfyf93jgpkbzmprmgv906jscfzvv1h8266c";
+                }) { };
+
+              implicit-hie-cradle = hself.callCabal2nix "implicit-hie-cradle"
+                (builtins.fetchTarball {
+                  url =
+                    "https://hackage.haskell.org/package/implicit-hie-cradle-0.3.0.5/implicit-hie-cradle-0.3.0.5.tar.gz";
+                  sha256 =
+                    "15a7g9x6cjk2b92hb2wilxx4550msxp1pmk5a2shiva821qaxnfq";
+                }) { };
+
+              ghc-source-gen = hself.callCabal2nix "ghc-source-gen"
+                (builtins.fetchTarball {
+                  url =
+                    "https://hackage.haskell.org/package/ghc-source-gen-0.4.1.0/ghc-source-gen-0.4.1.0.tar.gz";
+                  sha256 =
+                    "0kk599vk54ckikpxkzwrbx7z5x0xr20hr179rldmnlb34bf9mpnk";
+                }) { };
             };
 
           hlsSources =