diff --git a/builds.yml b/builds.yml
index 637dd3a..f592aeb 100644
--- a/builds.yml
+++ b/builds.yml
@@ -8,7 +8,7 @@ env:
   llvm_for_rust_pins:
     stable: &llvm_stable "19"
   nixpkgs:
-    unstable: &nixpkgs_unstable "4703b8d2c708e13a8cab03d865f90973536dcdf5"
+    unstable: &nixpkgs_unstable "2c27ab2e60502d1ebb7cf38909de38663f762a79"
   just:
     version: &just_version "1.37.0"
 # matrix describes the test structure which I expect to be relatively stable.
diff --git a/nix/versions.nix b/nix/versions.nix
index 6e12ea8..9f46ac9 100644
--- a/nix/versions.nix
+++ b/nix/versions.nix
@@ -2,31 +2,31 @@
 {
   nixpkgs = {
     branch = "nixpkgs-unstable";
-    commit = "4703b8d2c708e13a8cab03d865f90973536dcdf5";
-    commit_date = "2024-11-30T03:39:21+00:00";
-    source_url = "https://github.com/NixOS/nixpkgs/archive/4703b8d2c708e13a8cab03d865f90973536dcdf5.tar.gz";
+    commit = "2c27ab2e60502d1ebb7cf38909de38663f762a79";
+    commit_date = "2024-12-01T03:48:48+00:00";
+    source_url = "https://github.com/NixOS/nixpkgs/archive/2c27ab2e60502d1ebb7cf38909de38663f762a79.tar.gz";
     hash = {
       nix32 = {
         packed = {
           comment = "nix-prefetch-url generated hash of the nix archive file obtained from github archive (packed)";
-          sha256 = "1va72b7xdpszygc3sqh0h321vn20vpgdynfk1siwg57dykgsjyyg";
-          sha512 = "29s8klm833vamkvn9sh1ssii5hw1vbam6vkv81b4bvv6qxgwp84kndbb2d2m9wg3g0v25a5w8a4dzc48wvpqawlcmb7qwm02770p52p";
+          sha256 = "15rq5qhxpz2gsjpqam9m2x7gw2kzg5p8xzvv6kbdaki1yh1varr8";
+          sha512 = "1i55c8q28sq8brnn7l0yyv4mvyb4cd1pagpcqn9mmcm5afxqyls6i2df46lr1q3bzl8p43c1fxn5dx6c84iglnr3bfkw1w9xwddh9rj";
         };
         unpacked = {
           comment = "nix-prefetch-url generated hash of the nix archive file obtained from github archive (unpacked)";
-          sha256 = "1khdq4ycg0wcvbf6qhgf76h97y67mw197977ghmsfshmw97mi6h7";
+          sha256 = "0g6v2nwm5yxz2dj9pbwxvlhm006mgp46jrz0j8pgkml7j9zcxw4z";
         };
       };
       tar = {
         comment = "openssl generated hashes of the actual tar.gz file obtained from github archive";
-        sha256 = "cf7ba9dff4ed94c7a30ed359dfdedd40d81dc48000623dd8f35fdfd6cf1247ed";
-        sha384 = "91ef28c3938d41b19a75307faa845ea3c0676476ed994bcd10724d4e25c14d236450c1d01bf5df326661eca2eaabc971";
-        sha512 = "57940bce11a0727c5665942b7c374784fd4614e24515b1c11b8fa72a9a58abd949d0e5af63b3f7222ba03db7a96aedc0618951eb0075b27b56b5c740954ea493";
-        sha3_256 = "672d383d7c0508538c4190a82b20f9fc0ba22f274ec9c3226915c412547d10b3";
-        sha3_384 = "1b4d4f07b7ace08f033774fdd0c1ba13fd2d8f9b080b65cf7ae2218b67e3f6bef96c834d10861d59b5660c3b1ac2bfa7";
-        sha3_512 = "75e01b6b8a7f13e0f720a2a6c4f9d61c8d44556fa1a9048a65da04cf02e25f250463584902b621be04658152a97cf2f0f348c53b52d7efa6366c533f0cc26a30";
-        blake2b512 = "afd1fe765ca3fa7d8be547480ffc53cf798a4f59a58b065201b00389143bc93cce091cb93cca2a372ff67a0b6261794c794ace23aa43a556db083dc6ed9fe4fc";
-        blake2s256 = "0e64fe9146a0bf785af5ebc1e71e0055bb7fbca6d27ffe8788ffe4f3b994743c";
+        sha256 = "2867b503f4214ed5d6347bff8e6e797f0afe4e17355585afd44ffcdb212e3897";
+        sha384 = "908257842d7668774d9a81c9de0e4408f5b540cb43b8172b76ac8e98180f5fa6f74c325dfc74c5e6082272479da627c8";
+        sha512 = "3227d81aef89073edd1ad9d2170962a6b762bb0b6c908be85f03874c0d714d44a3a9c7dda95259adc962769fbaa131b2fcae647b0fe8b1362f84351218b15262";
+        sha3_256 = "0611119e700309155837e8c8d9433c6bcf876fa1a79b7c84972f043d2a26a314";
+        sha3_384 = "6afa26b315f7c5a3e0f7788cb02fb5569527b97d4a15f74972c223f712ac8f22480f36167c3b15fbeeaf5da79204d19d";
+        sha3_512 = "a4d092fe7993e85d516eaa137627823d815ee22e21cb94d224496b8e03ce5f726edcb1d80efd7cae2296b20554ab136854d1f8a067873e6ed74a3c00da25a00d";
+        blake2b512 = "8d7dbfd350739e6f3925453217ff5089c794c4a55aa06308a2c82f7984f6d7370cccf6ae1839cbf7b9904ff697b8b76fb5b9407aae7892da566874bd4c53241f";
+        blake2s256 = "e27f59497b205076de01610a3b9cab1f924baef7af6fab75ea7a1aca109c2550";
       };
     };
   };