diff --git a/nix/sources.json b/nix/sources.json
index 55c63c5..a59212e 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -12,15 +12,15 @@
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs": {
-        "branch": "nixpkgs-unstable",
-        "description": "A read-only mirror of NixOS/nixpkgs tracking the released channels. Send issues and PRs to",
-        "homepage": "https://github.com/NixOS/nixpkgs",
-        "owner": "NixOS",
-        "repo": "nixpkgs-channels",
-        "rev": "502845c3e31ef3de0e424f3fcb09217df2ce6df6",
-        "sha256": "0fcqpsy6y7dgn0y0wgpa56gsg0b0p8avlpjrd79fp4mp9bl18nda",
+        "branch": "nixos-21.05",
+        "description": "Nix Packages collection",
+        "homepage": "",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "9e86f5f7a19db6da2445f07bafa6694b556f9c6d",
+        "sha256": "0i2j7bf6jq3s13n12xahramami0n6zn1mksqgi01k7flpgyymcck",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs-channels/archive/502845c3e31ef3de0e424f3fcb09217df2ce6df6.tar.gz",
+        "url": "https://github.com/nixos/nixpkgs/archive/9e86f5f7a19db6da2445f07bafa6694b556f9c6d.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }