diff --git a/flake.lock b/flake.lock
index b4c5932..d121a64 100644
--- a/flake.lock
+++ b/flake.lock
@@ -18,11 +18,11 @@
     },
     "flake-utils": {
       "locked": {
-        "lastModified": 1634851050,
-        "narHash": "sha256-N83GlSGPJJdcqhUxSCS/WwW5pksYf3VP1M13cDRTSVA=",
+        "lastModified": 1637014545,
+        "narHash": "sha256-26IZAc5yzlD9FlDT54io1oqG/bBoyka+FJk5guaX4x4=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "c91f3de5adaf1de973b797ef7485e441a65b8935",
+        "rev": "bba5dcc8e0b20ab664967ad83d24d64cb64ec4f4",
         "type": "github"
       },
       "original": {
@@ -33,11 +33,11 @@
     },
     "flake-utils_2": {
       "locked": {
-        "lastModified": 1623875721,
-        "narHash": "sha256-A8BU7bjS5GirpAUv4QA+QnJ4CceLHkcXdRp4xITDB0s=",
+        "lastModified": 1637014545,
+        "narHash": "sha256-26IZAc5yzlD9FlDT54io1oqG/bBoyka+FJk5guaX4x4=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "f7e004a55b120c02ecb6219596820fcd32ca8772",
+        "rev": "bba5dcc8e0b20ab664967ad83d24d64cb64ec4f4",
         "type": "github"
       },
       "original": {
@@ -64,11 +64,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1636552551,
-        "narHash": "sha256-k7Hq/bvUnRlAfFjPGuw3FsSqqspQdRHsCHpgadw6UkQ=",
+        "lastModified": 1637448181,
+        "narHash": "sha256-ujcXli4esmtIHUBjE1BjmMuBWrcNvlHZrVXx56i5B1M=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9e86f5f7a19db6da2445f07bafa6694b556f9c6d",
+        "rev": "d5b65f812cd4f5a8fa74b406075b59a46f1cfd98",
         "type": "github"
       },
       "original": {
@@ -80,15 +80,16 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1628186154,
-        "narHash": "sha256-r2d0wvywFnL9z4iptztdFMhaUIAaGzrSs7kSok0PgmE=",
+        "lastModified": 1637453606,
+        "narHash": "sha256-Gy6cwUswft9xqsjWxFYEnx/63/qzaFUwatcbV5GF/GQ=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "06552b72346632b6943c8032e57e702ea12413bf",
+        "rev": "8afc4e543663ca0a6a4f496262cd05233737e732",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -108,11 +109,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1636683315,
-        "narHash": "sha256-udsMHw5gzZPvvFIhopoGicLK/LaYyDN3iAa1PEpP7uM=",
+        "lastModified": 1637633693,
+        "narHash": "sha256-4EqHaQrpevUcGGcWIoNuZWJEhA1GhcApCSBggR0r2MM=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "e87b7ea329fc78c5e5775c983193f630458c317f",
+        "rev": "885ef5bf9d2857dff8689292aedb511dfc952862",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 64e58f2..a5658f6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -28,7 +28,7 @@
       rec {
         devShell =
           pkgs.mkShell {
-            RUST_LOG = debug;
+            RUST_LOG = "debug";
             RUST_BACKTRACE = 1;
             buildInputs = [
               pkgs.rust-bin.stable.latest.default