diff --git a/examples/toolchains/cc/nixpkgs.json b/examples/toolchains/cc/nixpkgs.json
index 2542221a5..76ed35bdc 100644
--- a/examples/toolchains/cc/nixpkgs.json
+++ b/examples/toolchains/cc/nixpkgs.json
@@ -1,7 +1,7 @@
 {
   "owner": "NixOS",
   "repo": "nixpkgs",
-  "branch": "22.11",
-  "rev": "f413457e0dd7a42adefdbcea4391dd9751509025",
-  "sha256": "sha256-F7/F65ZFWbq7cKSiV3K2acxCv64jKaZZ/K0A3VNT2kA="
+  "branch": "nixos-23.11",
+  "rev": "b2cf36f43f9ef2ded5711b30b1f393ac423d8f72",
+  "sha256": "07mmgn752nzh8fish8ff5ar9dbdbiv79qb3hl4sazbckqkw38avc"
 }
diff --git a/examples/toolchains/cc_cross_osx_to_linux_amd64/nixpkgs.json b/examples/toolchains/cc_cross_osx_to_linux_amd64/nixpkgs.json
index d470df94d..76ed35bdc 100644
--- a/examples/toolchains/cc_cross_osx_to_linux_amd64/nixpkgs.json
+++ b/examples/toolchains/cc_cross_osx_to_linux_amd64/nixpkgs.json
@@ -1,7 +1,7 @@
 {
   "owner": "NixOS",
   "repo": "nixpkgs",
-  "branch": "23.05",
-  "rev": "3ad64d9e2d5bf80c877286102355b1625891ae9a",
-  "sha256": "sha256-PuZSAHeq4/9pP/uYH1FcagQ3nLm/DrDrvKi/xC9glvw="
+  "branch": "nixos-23.11",
+  "rev": "b2cf36f43f9ef2ded5711b30b1f393ac423d8f72",
+  "sha256": "07mmgn752nzh8fish8ff5ar9dbdbiv79qb3hl4sazbckqkw38avc"
 }
diff --git a/examples/toolchains/cc_with_deps/nixpkgs.json b/examples/toolchains/cc_with_deps/nixpkgs.json
index 2542221a5..76ed35bdc 100644
--- a/examples/toolchains/cc_with_deps/nixpkgs.json
+++ b/examples/toolchains/cc_with_deps/nixpkgs.json
@@ -1,7 +1,7 @@
 {
   "owner": "NixOS",
   "repo": "nixpkgs",
-  "branch": "22.11",
-  "rev": "f413457e0dd7a42adefdbcea4391dd9751509025",
-  "sha256": "sha256-F7/F65ZFWbq7cKSiV3K2acxCv64jKaZZ/K0A3VNT2kA="
+  "branch": "nixos-23.11",
+  "rev": "b2cf36f43f9ef2ded5711b30b1f393ac423d8f72",
+  "sha256": "07mmgn752nzh8fish8ff5ar9dbdbiv79qb3hl4sazbckqkw38avc"
 }
diff --git a/examples/toolchains/go/nixpkgs.json b/examples/toolchains/go/nixpkgs.json
index 2542221a5..76ed35bdc 100644
--- a/examples/toolchains/go/nixpkgs.json
+++ b/examples/toolchains/go/nixpkgs.json
@@ -1,7 +1,7 @@
 {
   "owner": "NixOS",
   "repo": "nixpkgs",
-  "branch": "22.11",
-  "rev": "f413457e0dd7a42adefdbcea4391dd9751509025",
-  "sha256": "sha256-F7/F65ZFWbq7cKSiV3K2acxCv64jKaZZ/K0A3VNT2kA="
+  "branch": "nixos-23.11",
+  "rev": "b2cf36f43f9ef2ded5711b30b1f393ac423d8f72",
+  "sha256": "07mmgn752nzh8fish8ff5ar9dbdbiv79qb3hl4sazbckqkw38avc"
 }
diff --git a/examples/toolchains/java/nixpkgs.json b/examples/toolchains/java/nixpkgs.json
index 3ad9818d2..76ed35bdc 100644
--- a/examples/toolchains/java/nixpkgs.json
+++ b/examples/toolchains/java/nixpkgs.json
@@ -1,8 +1,7 @@
 {
   "owner": "NixOS",
   "repo": "nixpkgs",
-  "branch": "22.11",
-  "rev": "f413457e0dd7a42adefdbcea4391dd9751509025",
-  "sha256": "sha256-F7/F65ZFWbq7cKSiV3K2acxCv64jKaZZ/K0A3VNT2kA="
+  "branch": "nixos-23.11",
+  "rev": "b2cf36f43f9ef2ded5711b30b1f393ac423d8f72",
+  "sha256": "07mmgn752nzh8fish8ff5ar9dbdbiv79qb3hl4sazbckqkw38avc"
 }
-
diff --git a/examples/toolchains/java/nixpkgs.nix b/examples/toolchains/java/nixpkgs.nix
index 143e52be4..6db312a36 100644
--- a/examples/toolchains/java/nixpkgs.nix
+++ b/examples/toolchains/java/nixpkgs.nix
@@ -1,5 +1,4 @@
 let
-  # nixpkgs as of 2022-02-21
   spec = builtins.fromJSON (builtins.readFile ./nixpkgs.json);
   nixpkgs = fetchTarball {
     url = "https://github.com/${spec.owner}/${spec.repo}/archive/${spec.rev}.tar.gz";
@@ -7,4 +6,3 @@ let
   };
 in
 import nixpkgs
-
diff --git a/examples/toolchains/nodejs/nixpkgs.json b/examples/toolchains/nodejs/nixpkgs.json
index 2542221a5..76ed35bdc 100644
--- a/examples/toolchains/nodejs/nixpkgs.json
+++ b/examples/toolchains/nodejs/nixpkgs.json
@@ -1,7 +1,7 @@
 {
   "owner": "NixOS",
   "repo": "nixpkgs",
-  "branch": "22.11",
-  "rev": "f413457e0dd7a42adefdbcea4391dd9751509025",
-  "sha256": "sha256-F7/F65ZFWbq7cKSiV3K2acxCv64jKaZZ/K0A3VNT2kA="
+  "branch": "nixos-23.11",
+  "rev": "b2cf36f43f9ef2ded5711b30b1f393ac423d8f72",
+  "sha256": "07mmgn752nzh8fish8ff5ar9dbdbiv79qb3hl4sazbckqkw38avc"
 }
diff --git a/examples/toolchains/python/nixpkgs.json b/examples/toolchains/python/nixpkgs.json
index 2542221a5..76ed35bdc 100644
--- a/examples/toolchains/python/nixpkgs.json
+++ b/examples/toolchains/python/nixpkgs.json
@@ -1,7 +1,7 @@
 {
   "owner": "NixOS",
   "repo": "nixpkgs",
-  "branch": "22.11",
-  "rev": "f413457e0dd7a42adefdbcea4391dd9751509025",
-  "sha256": "sha256-F7/F65ZFWbq7cKSiV3K2acxCv64jKaZZ/K0A3VNT2kA="
+  "branch": "nixos-23.11",
+  "rev": "b2cf36f43f9ef2ded5711b30b1f393ac423d8f72",
+  "sha256": "07mmgn752nzh8fish8ff5ar9dbdbiv79qb3hl4sazbckqkw38avc"
 }
diff --git a/examples/toolchains/rust/nixpkgs.json b/examples/toolchains/rust/nixpkgs.json
index 6cbfbde98..76ed35bdc 100644
--- a/examples/toolchains/rust/nixpkgs.json
+++ b/examples/toolchains/rust/nixpkgs.json
@@ -2,6 +2,6 @@
   "owner": "NixOS",
   "repo": "nixpkgs",
   "branch": "nixos-23.11",
-  "rev": "32f63574c85fbc80e4ba1fbb932cde9619bad25e",
-  "sha256": "sha256:1qykaq7a8kmk4nd6xz4zv35yi2jwbw93p93y4wh1dwxf9h0kqjhb"
+  "rev": "b2cf36f43f9ef2ded5711b30b1f393ac423d8f72",
+  "sha256": "07mmgn752nzh8fish8ff5ar9dbdbiv79qb3hl4sazbckqkw38avc"
 }