diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index fc9f300315..65d102e45f 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -89,8 +89,6 @@ jobs:
 
     - uses: cachix/install-nix-action@v18
       with:
-        install_url: https://nixos-nix-install-tests.cachix.org/serve/i6laym9jw3wg9mw6ncyrk6gjx4l34vvx/install
-        install_options: '--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve'
         extra_nix_config: |
           experimental-features = nix-command flakes
         nix_path: nixpkgs=channel:nixos-unstable
diff --git a/flake.lock b/flake.lock
index 2ac39dc862..fa08ce799d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -148,6 +148,18 @@
         "url": "https://hackage.haskell.org/package/hlint-3.4/hlint-3.4.tar.gz"
       }
     },
+    "implicit-hie": {
+      "flake": false,
+      "locked": {
+        "narHash": "sha256-bFPhAuQe5IjKYQIz1OEC/j/imDESAv3H1nLNVM3lZF4=",
+        "type": "tarball",
+        "url": "https://hackage.haskell.org/package/implicit-hie-0.1.2.7/implicit-hie-0.1.2.7.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://hackage.haskell.org/package/implicit-hie-0.1.2.7/implicit-hie-0.1.2.7.tar.gz"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1668650906,
@@ -189,6 +201,7 @@
         "hiedb": "hiedb",
         "hlint": "hlint",
         "hlint-34": "hlint-34",
+        "implicit-hie": "implicit-hie",
         "nixpkgs": "nixpkgs",
         "ptr-poker": "ptr-poker"
       }
diff --git a/flake.nix b/flake.nix
index 99820fc88b..1831e7cbeb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -59,6 +59,10 @@
       url = "https://hackage.haskell.org/package/hiedb-0.4.2.0/hiedb-0.4.2.0.tar.gz";
       flake = false;
     };
+    implicit-hie = {
+      url = "https://hackage.haskell.org/package/implicit-hie-0.1.2.7/implicit-hie-0.1.2.7.tar.gz";
+      flake = false;
+    };
   };
   outputs =
     inputs@{ self, nixpkgs, flake-compat, flake-utils, gitignore, all-cabal-hashes-unpacked, ... }:
@@ -122,6 +126,7 @@
               # Patches don't apply
               github = overrideCabal hsuper.github (drv: { patches = []; });
               hiedb = hsuper.callCabal2nix "hiedb" inputs.hiedb {};
+              implicit-hie = hsuper.callCabal2nix "implicit-hie" inputs.implicit-hie {};
 
               # https://github.com/NixOS/nixpkgs/issues/140774
               ormolu =
diff --git a/ghcide/ghcide.cabal b/ghcide/ghcide.cabal
index 9d898bbef9..5034e354c2 100644
--- a/ghcide/ghcide.cabal
+++ b/ghcide/ghcide.cabal
@@ -104,6 +104,11 @@ library
         ghc-paths,
         cryptohash-sha1 >=0.11.100 && <0.12,
         hie-bios ^>= 0.11.0,
+        -- implicit-hie 0.1.3.0 introduced an unexpected behavioral change.
+        -- https://github.com/Avi-D-coder/implicit-hie/issues/50
+        -- to make sure ghcide behaves in a desirable way, we put implicit-hie
+        -- fake dependency here.
+        implicit-hie < 0.1.3,
         implicit-hie-cradle ^>= 0.3.0.5 || ^>= 0.5,
         base16-bytestring >=0.1.1 && <1.1
     if os(windows)
diff --git a/plugins/hls-cabal-plugin/hls-cabal-plugin.cabal b/plugins/hls-cabal-plugin/hls-cabal-plugin.cabal
index f202b633c3..67170c10ab 100644
--- a/plugins/hls-cabal-plugin/hls-cabal-plugin.cabal
+++ b/plugins/hls-cabal-plugin/hls-cabal-plugin.cabal
@@ -45,7 +45,6 @@ library
     -- This is a lot of work for almost zero benefit, so we just allow more versions here
     -- and we eventually completely drop support for building HLS with stack.
     , Cabal                 ^>=3.2 || ^>=3.4 || ^>=3.6 || ^>= 3.8
-    , Cabal-syntax          ^>= 3.6
     , deepseq
     , directory
     , extra                 >=1.7.4