flake.nix dmd build fix overlay: revert to GCC14

- revert to using GCC14: (current) GCC 15
  introduced nullptr in its headers, and DMD's
  ImportC parser needs update to handle it,
  monitor and update

- (nix ldc overlay, minor comsetic)

1 files changed, 3 insertions, 3 deletions

diff --git a/flake.lock b/flake.lock
index d98f5a2..02cec2f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1773628058,
-        "narHash": "sha256-hpXH0z3K9xv0fHaje136KY872VT2T5uwxtezlAskQgY=",
+        "lastModified": 1775701739,
+        "narHash": "sha256-2FWWY1rr/+pGUJK1npcVcsWNEblzmKs6VxD3VEvwJSs=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f8573b9c935cfaa162dd62cc9e75ae2db86f85df",
+        "rev": "0f7663154ff2fec150f9dbf5f81ec2785dc1e0db",
         "type": "github"
       },
       "original": {