diff --git a/nix/base-system/flake.lock b/nix/base-system/flake.lock
index 0800ebb..a142d6d 100644
--- a/nix/base-system/flake.lock
+++ b/nix/base-system/flake.lock
@@ -48,23 +48,23 @@
       "inputs": {
         "d2-vim-src": "d2-vim-src",
         "flake-utils": "flake-utils_3",
+        "ionide-nvim-src": "ionide-nvim-src",
         "neogit-src": "neogit-src",
         "nil-flake": "nil-flake",
         "nixpkgs": [
           "nixpkgs"
         ],
         "nurl-flake": "nurl-flake",
-        "nvim-bnf-src": "nvim-bnf-src",
         "roslyn-lsp": "roslyn-lsp",
         "treesitter-context": "treesitter-context",
         "victoria-logs-src": "victoria-logs-src"
       },
       "locked": {
-        "lastModified": 1728497279,
-        "narHash": "sha256-O0/mAUkaFzfN9MZ/p343P0nY9JIJWsCyDSQgOtBhJkw=",
+        "lastModified": 1728571393,
+        "narHash": "sha256-ERtPLZLCyp1zZkXieq05GgvEiR4merRWW8jmHqMgg/Q=",
         "owner": "zaphar",
         "repo": "nix-flakes",
-        "rev": "6f231a42300bd08084f52cca55ca96207c68344e",
+        "rev": "06fe1017712529cc66aae868ce0f7c17551724e7",
         "type": "github"
       },
       "original": {
@@ -538,6 +538,22 @@
         "type": "github"
       }
     },
+    "ionide-nvim-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1725347912,
+        "narHash": "sha256-tEpolSQcAt1Y/y7ZG5vW1THm8raBnXqTBTsIc1M4zVM=",
+        "owner": "ionide",
+        "repo": "ionide-vim",
+        "rev": "268955cc106f8328a232b160a7360cf331c0a323",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ionide",
+        "repo": "ionide-vim",
+        "type": "github"
+      }
+    },
     "libtexpdf-src": {
       "flake": false,
       "locked": {
@@ -970,22 +986,6 @@
         "type": "github"
       }
     },
-    "nvim-bnf-src": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1555099325,
-        "narHash": "sha256-zeW/2wIAwvxb/R8bXDjPEYvB8KWBDx6T0DcMH6NY2NU=",
-        "owner": "daskol",
-        "repo": "nvim-bnf",
-        "rev": "749aa45be562d4d24340719e66ae750001885f38",
-        "type": "github"
-      },
-      "original": {
-        "owner": "daskol",
-        "repo": "nvim-bnf",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
         "agenix-flake": "agenix-flake",
diff --git a/nix/base-system/flake.nix b/nix/base-system/flake.nix
index 6f84e2f..7ea8032 100644
--- a/nix/base-system/flake.nix
+++ b/nix/base-system/flake.nix
@@ -102,6 +102,7 @@
         #nvim-bnf = custom-flakes.packages."${system}".nvim-bnf;
         nvim-treesitter-context = custom-flakes.packages."${system}".nvim-treesitter-context;
         roslyn-nvim = custom-flakes.packages."${system}".roslyn-nvim;
+        ionide-nvim = custom-flakes.packages."${system}".ionide-nvim;
         nvim = neovim-flake.packages."${system}".neovim;
         # TODO(jwall): When this actually builds we should use it.
 		#nvim-treesitter-powershell = pkgs.callPackage ./nvim-powershell.nix {
@@ -158,7 +159,7 @@ EOF";
                 lualine-lsp-progress
                 lean-nvim
                 roslyn-nvim
-                #nvim-bnf
+                ionide-nvim # Fsharp lsp support
                 nvim-treesitter-context
                 nvim-treesitter-textobjects
 				nvim-treesitter-parsers.ini