diff --git a/flake.lock b/flake.lock
index 140b7e06..1cf7bb64 100644
--- a/flake.lock
+++ b/flake.lock
@@ -112,18 +112,17 @@
         "type": "github"
       },
       "original": {
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "type": "github"
+        "id": "flake-compat",
+        "type": "indirect"
       }
     },
     "flake-utils": {
       "locked": {
-        "lastModified": 1631561581,
-        "narHash": "sha256-3VQMV5zvxaVLvqqUrNz3iJelLw30mIVSfZmAaauM3dA=",
+        "lastModified": 1634851050,
+        "narHash": "sha256-N83GlSGPJJdcqhUxSCS/WwW5pksYf3VP1M13cDRTSVA=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "7e5bf3925f6fbdfaf50a2a7ca0be2879c4261d19",
+        "rev": "c91f3de5adaf1de973b797ef7485e441a65b8935",
         "type": "github"
       },
       "original": {
@@ -156,9 +155,8 @@
         "type": "github"
       },
       "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
+        "id": "flake-utils",
+        "type": "indirect"
       }
     },
     "ghc-8.6.5-iohk": {
@@ -197,11 +195,11 @@
     "hackage": {
       "flake": false,
       "locked": {
-        "lastModified": 1633482708,
-        "narHash": "sha256-2aP78GHvCxF7nNT3CE7ay9IRGJ9pa0mNPGTJPmk9r9s=",
+        "lastModified": 1635383520,
+        "narHash": "sha256-Wg4AhSBpP5oRiW2hBWJlqQlYqqe3KdCd1d5kTB4+Hv8=",
         "owner": "input-output-hk",
         "repo": "hackage.nix",
-        "rev": "7e998407af7dd228ed7cf0c2992290511690a368",
+        "rev": "8aad4c032a62e5f9323b5fc9ca9449e724ee269d",
         "type": "github"
       },
       "original": {
@@ -267,11 +265,11 @@
     "lowdown-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1598695561,
-        "narHash": "sha256-gyH/5j+h/nWw0W8AcR2WKvNBUsiQ7QuxqSJNXAwV+8E=",
+        "lastModified": 1632468475,
+        "narHash": "sha256-NNOm9CbdA8cuwbvaBHslGbPTiU6bh1Ao+MpEPx4rSGo=",
         "owner": "kristapsdz",
         "repo": "lowdown",
-        "rev": "1705b4a26fbf065d9574dce47a94e8c7c79e052f",
+        "rev": "6bd668af3fd098bdd07a1bedd399564141e275da",
         "type": "github"
       },
       "original": {
@@ -280,6 +278,24 @@
         "type": "github"
       }
     },
+    "nix": {
+      "inputs": {
+        "lowdown-src": "lowdown-src",
+        "nixpkgs": "nixpkgs_3"
+      },
+      "locked": {
+        "lastModified": 1633098935,
+        "narHash": "sha256-UtuBczommNLwUNEnfRI7822z4vPA7OoRKsgAZ8zsHQI=",
+        "owner": "nixos",
+        "repo": "nix",
+        "rev": "4f496150eb4e0012914c11f0a3ff4df2412b1d09",
+        "type": "github"
+      },
+      "original": {
+        "id": "nix",
+        "type": "indirect"
+      }
+    },
     "nix-npm-buildpackage": {
       "locked": {
         "lastModified": 1624358188,
@@ -310,26 +326,6 @@
         "type": "github"
       }
     },
-    "nix-unstable": {
-      "inputs": {
-        "lowdown-src": "lowdown-src",
-        "nixpkgs": "nixpkgs_3"
-      },
-      "locked": {
-        "lastModified": 1605715425,
-        "narHash": "sha256-h4VEpxnPBoUigXeoy0/8z8jUFKkJD9XG5dR/lt/rQCk=",
-        "owner": "nixos",
-        "repo": "nix",
-        "rev": "79aa7d95183cbe6c0d786965f0dbff414fd1aa67",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "repo": "nix",
-        "rev": "79aa7d95183cbe6c0d786965f0dbff414fd1aa67",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1632086102,
@@ -426,32 +422,31 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1602702596,
-        "narHash": "sha256-fqJ4UgOb4ZUnCDIapDb4gCrtAah5Rnr2/At3IzMitig=",
+        "lastModified": 1632864508,
+        "narHash": "sha256-d127FIvGR41XbVRDPVvozUPQ/uRHbHwvfyKHwEt5xFM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ad0d20345219790533ebe06571f82ed6b034db31",
+        "rev": "82891b5e2c2359d7e58d08849e4c89511ab94234",
         "type": "github"
       },
       "original": {
         "id": "nixpkgs",
-        "ref": "nixos-20.09-small",
+        "ref": "nixos-21.05-small",
         "type": "indirect"
       }
     },
     "nixpkgs_4": {
       "locked": {
-        "lastModified": 1631273642,
-        "narHash": "sha256-LeD8U6LijyPHgr5ECLk7cobb4EkgPyPJJjxcYNi8noo=",
+        "lastModified": 1632495107,
+        "narHash": "sha256-4NGE56r+FJGBaCYu3CTH4O83Ys4TrtnEPXrvdwg1TDs=",
         "owner": "serokell",
         "repo": "nixpkgs",
-        "rev": "1714a2ead1a18678afa3cbf75dff3f024c579061",
+        "rev": "be220b2dc47092c1e739bf6aaf630f29e71fe1c4",
         "type": "github"
       },
       "original": {
-        "owner": "serokell",
-        "repo": "nixpkgs",
-        "type": "github"
+        "id": "nixpkgs",
+        "type": "indirect"
       }
     },
     "old-ghc-nix": {
@@ -488,15 +483,15 @@
         "flake-compat": "flake-compat_2",
         "flake-utils": "flake-utils_3",
         "gitignore-nix": "gitignore-nix",
-        "nix-unstable": "nix-unstable",
+        "nix": "nix",
         "nixpkgs": "nixpkgs_4"
       },
       "locked": {
-        "lastModified": 1633195245,
-        "narHash": "sha256-NllXpwBhmqSPk5fVAHdwry8ef9dpqb1AtJZnigMgZNM=",
+        "lastModified": 1635257949,
+        "narHash": "sha256-gQpBQaFzM3Z+PectyCROSBEAoHjuza1vz5UFOcfbzY8=",
         "owner": "serokell",
         "repo": "serokell.nix",
-        "rev": "930612926b588c02348628dd5d23c01f538a7303",
+        "rev": "b77d9b0725716a05ca6253ffb89aeff51565ac93",
         "type": "github"
       },
       "original": {
@@ -507,11 +502,11 @@
     "stackage": {
       "flake": false,
       "locked": {
-        "lastModified": 1633482826,
-        "narHash": "sha256-DA9i3gh+OlR5lIPi5QZDF7ug2vItUxxe6P/QQHWucd0=",
+        "lastModified": 1635297247,
+        "narHash": "sha256-/tUTVKYkZD9JmJsNQN2dTknca9MLyw5wHOunAInfprw=",
         "owner": "input-output-hk",
         "repo": "stackage.nix",
-        "rev": "a5b54c60f284e2c9e05120216ca9d9412e98e198",
+        "rev": "257e40322e59dc94f4a579a053ce1c52448db540",
         "type": "github"
       },
       "original": {