diff --git a/flake.lock b/flake.lock
index 78277f4892d..2a292697221 100644
--- a/flake.lock
+++ b/flake.lock
@@ -21,11 +21,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1694529238,
-        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "lastModified": 1701680307,
+        "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "rev": "4022d587cbbfd70fe950c1e2083a02621806a725",
         "type": "github"
       },
       "original": {
@@ -59,11 +59,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1701253981,
-        "narHash": "sha256-ztaDIyZ7HrTAfEEUt9AtTDNoCYxUdSd6NrRHaYOIxtk=",
+        "lastModified": 1702151865,
+        "narHash": "sha256-9VAt19t6yQa7pHZLDbil/QctAgVsA66DLnzdRGqDisg=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "e92039b55bcd58469325ded85d4f58dd5a4eaf58",
+        "rev": "666fc80e7b2afb570462423cb0e1cf1a3a34fedd",
         "type": "github"
       },
       "original": {
@@ -92,11 +92,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1701483183,
-        "narHash": "sha256-MDH3oUajqTaYClCiq1QK7jWVMtMFDJWxVBCFAnkt6J4=",
+        "lastModified": 1702261031,
+        "narHash": "sha256-FUsBGXDJapq88XH1+3xfeeZS6cwKnScPkhGMzHn0Dgo=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "47fe4578cb64a365f400e682a70e054657c42fa5",
+        "rev": "d3c43c05ef3cd66ddab4a5a82a7df71e40496aa5",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 769990d0ba8..fc8498ac251 100644
--- a/flake.nix
+++ b/flake.nix
@@ -126,6 +126,8 @@
 
           shellHook = ''
             export LLVM_SYS_${llvmMajorMinorStr}_PREFIX="${llvmPkgs.llvm.dev}"
+            # faster builds - see https://github.com/roc-lang/roc/blob/main/BUILDING_FROM_SOURCE.md#use-lld-for-the-linker
+            export RUSTFLAGS="-C link-arg=-fuse-ld=lld -C link-arg=-fuse-ld=lld $RUSTFLAGS"
             ${aliases}
           '';
         };