diff --git a/contrib/crunch-v2/rustfmt.toml b/contrib/crunch-v2/rustfmt.toml
deleted file mode 100644
index f216078d9..000000000
--- a/contrib/crunch-v2/rustfmt.toml
+++ /dev/null
@@ -1 +0,0 @@
-edition = "2024"
diff --git a/contrib/fetchroots/rustfmt.toml b/contrib/fetchroots/rustfmt.toml
deleted file mode 100644
index f216078d9..000000000
--- a/contrib/fetchroots/rustfmt.toml
+++ /dev/null
@@ -1 +0,0 @@
-edition = "2024"
diff --git a/contrib/narinfo2parquet/rustfmt.toml b/contrib/narinfo2parquet/rustfmt.toml
deleted file mode 100644
index f216078d9..000000000
--- a/contrib/narinfo2parquet/rustfmt.toml
+++ /dev/null
@@ -1 +0,0 @@
-edition = "2024"
diff --git a/contrib/snixbolt/rustfmt.toml b/contrib/snixbolt/rustfmt.toml
deleted file mode 100644
index f216078d9..000000000
--- a/contrib/snixbolt/rustfmt.toml
+++ /dev/null
@@ -1 +0,0 @@
-edition = "2024"
diff --git a/contrib/turbofetch/rustfmt.toml b/contrib/turbofetch/rustfmt.toml
deleted file mode 100644
index f216078d9..000000000
--- a/contrib/turbofetch/rustfmt.toml
+++ /dev/null
@@ -1 +0,0 @@
-edition = "2024"
diff --git a/contrib/weave/rustfmt.toml b/contrib/weave/rustfmt.toml
deleted file mode 100644
index f216078d9..000000000
--- a/contrib/weave/rustfmt.toml
+++ /dev/null
@@ -1 +0,0 @@
-edition = "2024"
diff --git a/ops/gerrit-autosubmit/rustfmt.toml b/ops/gerrit-autosubmit/rustfmt.toml
deleted file mode 100644
index f216078d9..000000000
--- a/ops/gerrit-autosubmit/rustfmt.toml
+++ /dev/null
@@ -1 +0,0 @@
-edition = "2024"
diff --git a/rustfmt.toml b/rustfmt.toml
index 3a26366d4..28ead5702 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1 +1,2 @@
-edition = "2021"
+# This file exists, because the CI depotfmt script calls rustfmt directly, instead of cargo fmt.
+edition = "2024"
diff --git a/snix/build/rustfmt.toml b/snix/build/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/build/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/castore-http/rustfmt.toml b/snix/castore-http/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/castore-http/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/castore/rustfmt.toml b/snix/castore/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/castore/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/cli/rustfmt.toml b/snix/cli/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/cli/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/eval/builtin-macros/rustfmt.toml b/snix/eval/builtin-macros/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/eval/builtin-macros/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/eval/rustfmt.toml b/snix/eval/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/eval/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/glue/rustfmt.toml b/snix/glue/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/glue/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/nar-bridge/rustfmt.toml b/snix/nar-bridge/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/nar-bridge/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/nix-compat-derive-tests/rustfmt.toml b/snix/nix-compat-derive-tests/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/nix-compat-derive-tests/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/nix-compat-derive/rustfmt.toml b/snix/nix-compat-derive/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/nix-compat-derive/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/nix-compat/rustfmt.toml b/snix/nix-compat/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/nix-compat/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/nix-daemon/rustfmt.toml b/snix/nix-daemon/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/nix-daemon/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/serde/rustfmt.toml b/snix/serde/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/serde/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/store/rustfmt.toml b/snix/store/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/store/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"
diff --git a/snix/tracing/rustfmt.toml b/snix/tracing/rustfmt.toml
deleted file mode 100644
index 4dfc1d2b7..000000000
--- a/snix/tracing/rustfmt.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-# FUTUREWORK: move to .. once all crates are migrated (#114)
-edition = "2024"