Update flake.

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "flake-utils": {
       "locked": {
-        "lastModified": 1610051610,
-        "narHash": "sha256-U9rPz/usA1/Aohhk7Cmc2gBrEEKRzcW4nwPWMPwja4Y=",
+        "lastModified": 1614513358,
+        "narHash": "sha256-LakhOx3S1dRjnh0b5Dg3mbZyH0ToC9I8Y2wKSkBaTzU=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "3982c9903e93927c2164caa727cd3f6a0e6d14cc",
+        "rev": "5466c5bbece17adaab2d82fae80b46e807611bf3",
         "type": "github"
       },
       "original": {
@@ -35,11 +35,11 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1613655351,
-        "narHash": "sha256-BLBnt3BYsh92qKgqZljckM9s5sZUt30cBQF5b/5pVCU=",
+        "lastModified": 1614785451,
+        "narHash": "sha256-TPw8kQvr2UNCuvndtY+EjyXp6Q5GEW2l9UafXXh1XmI=",
         "owner": "nmattia",
         "repo": "naersk",
-        "rev": "1a9e5ddc51bc44c1bf872e02fe2702dc40e8af48",
+        "rev": "e0fe990b478a66178a58c69cf53daec0478ca6f9",
         "type": "github"
       },
       "original": {
@@ -50,10 +50,10 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1613917044,
-        "narHash": "sha256-YvBBwtvrnove51SXQ67OVQHctYjEEpFu6GEzRe0pp5I=",
-        "path": "/nix/store/8mfw3h418igbhn3kh2fglr3nm96x3117-source",
-        "rev": "aed173ff9707387b238c1c7e143152ca9d8878e9",
+        "lastModified": 1616670887,
+        "narHash": "sha256-wn+l9qJfR5sj5Gq4DheJHAcBDfOs9K2p9seW2f35xzs=",
+        "path": "/nix/store/54xsxxsx2vmlyfw4q2ads0jv3iayv1lc-source",
+        "rev": "c0e881852006b132236cbf0301bd1939bb50867e",
         "type": "path"
       },
       "original": {
@@ -63,11 +63,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1614191423,
-        "narHash": "sha256-As8TFDUW6CMCN5zlw5dVnZiwakO1cRKYPk64rsr32uU=",
+        "lastModified": 1617082367,
+        "narHash": "sha256-W0cQPGjc4IVzryaGycuoS8KZkXafS1P23w/fcKLoD5Y=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "f6b5bfdb470d60a876992749d0d708ed7b6b56ca",
+        "rev": "04a2b269d8921505a2969fc9ec25c1f517f2b307",
         "type": "github"
       },
       "original": {
@@ -104,11 +104,11 @@
         "nixpkgs": "nixpkgs_3"
       },
       "locked": {
-        "lastModified": 1614306536,
-        "narHash": "sha256-ZvOeJgmiXpc4VdUARk/0wJI7kiJLrXTBTjMI1R8GtQo=",
+        "lastModified": 1617244077,
+        "narHash": "sha256-lAOLV0ZlulxLxLyldRuTx187/c/SDLoRH6TsrUzZsB0=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "7d5d37d259a2a1744013702caec249ad4e7477c7",
+        "rev": "f18edbcb270b5245455bab58b721e4d748963b09",
         "type": "github"
       },
       "original": {