update sources

nix/sources.json

@@ -17,10 +17,10 @@
         "homepage": "",
         "owner": "nmattia",
         "repo": "naersk",
-        "rev": "6e149bfd726a8ebefa415f2d713ba6d942435abd",
-        "sha256": "1rzxr4xvsbbfdwcc0np1pl16m6cqql73qnbdsisswgqnjjswnjgc",
+        "rev": "4f7426c362809e472d03c369d3674317c32b6863",
+        "sha256": "1c0f2c4gkfmrpykmk25ck8x17nq7l14di8vvxlibbigzy5jacdaf",
         "type": "tarball",
-        "url": "https://github.com/nmattia/naersk/archive/6e149bfd726a8ebefa415f2d713ba6d942435abd.tar.gz",
+        "url": "https://github.com/nmattia/naersk/archive/4f7426c362809e472d03c369d3674317c32b6863.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "niv": {
@@ -29,22 +29,22 @@
         "homepage": "https://github.com/nmattia/niv",
         "owner": "nmattia",
         "repo": "niv",
-        "rev": "af958e8057f345ee1aca714c1247ef3ba1c15f5e",
-        "sha256": "1qjavxabbrsh73yck5dcq8jggvh3r2jkbr6b5nlz5d9yrqm9255n",
+        "rev": "527494090f7075ed5e3aa15ef7093846e5e25d52",
+        "sha256": "1hahf0i0iix1iyzaaq5a7rbgyfm3xjcfl69lm1b5mas1p8vdimih",
         "type": "tarball",
-        "url": "https://github.com/nmattia/niv/archive/af958e8057f345ee1aca714c1247ef3ba1c15f5e.tar.gz",
+        "url": "https://github.com/nmattia/niv/archive/527494090f7075ed5e3aa15ef7093846e5e25d52.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs": {
-        "branch": "release-20.03",
+        "branch": "release-21.05",
         "description": "Nix Packages collection",
         "homepage": "",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "929768261a3ede470eafb58d5b819e1a848aa8bf",
-        "sha256": "0zi54vbfi6i6i5hdd4v0l144y1c8rg6hq6818jjbbcnm182ygyfa",
+        "rev": "39c1857cd54397085932a84036f3aa95c8ef5aa3",
+        "sha256": "132xjzaqvnbs3arp0lhsj5k18nfm4yjai6l5w7abzi9hcnqz9p0i",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/929768261a3ede470eafb58d5b819e1a848aa8bf.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/39c1857cd54397085932a84036f3aa95c8ef5aa3.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }