diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 654296c..e95c1ef 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - uses: dtolnay/rust-toolchain@1.70.0
+    - uses: dtolnay/rust-toolchain@1.75.0
       with:
         components: rustfmt
     - name: Check formatting
diff --git a/Cargo.lock b/Cargo.lock
index 19c25c1..865ea94 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -232,7 +232,7 @@ checksum = "4bcfec3a70f97c962c307b2d2c56e358cf1d00b558d74262b5f929ee8cc7e73a"
 dependencies = [
  "errno-dragonfly",
  "libc",
- "windows-sys 0.48.0",
+ "windows-sys",
 ]
 
 [[package]]
@@ -254,18 +254,6 @@ dependencies = [
  "instant",
 ]
 
-[[package]]
-name = "filetime"
-version = "0.2.23"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ee447700ac8aa0b2f2bd7bc4462ad686ba06baa6727ac149a2d6277f0d240fd"
-dependencies = [
- "cfg-if",
- "libc",
- "redox_syscall 0.4.1",
- "windows-sys 0.52.0",
-]
-
 [[package]]
 name = "half"
 version = "1.8.2"
@@ -295,7 +283,7 @@ checksum = "eae7b9aee968036d54dce06cebaefd919e4472e753296daccd6d344e3e2df0c2"
 dependencies = [
  "hermit-abi",
  "libc",
- "windows-sys 0.48.0",
+ "windows-sys",
 ]
 
 [[package]]
@@ -306,7 +294,7 @@ checksum = "cb0889898416213fab133e1d33a0e5858a48177452750691bde3666d0fdbaf8b"
 dependencies = [
  "hermit-abi",
  "rustix 0.38.3",
- "windows-sys 0.48.0",
+ "windows-sys",
 ]
 
 [[package]]
@@ -390,12 +378,11 @@ dependencies = [
  "anyhow",
  "argh",
  "criterion",
- "filetime",
  "jemallocator",
  "libc",
  "rustc-hash",
  "tempfile",
- "windows-sys 0.48.0",
+ "windows-sys",
 ]
 
 [[package]]
@@ -494,15 +481,6 @@ dependencies = [
  "bitflags 1.3.2",
 ]
 
-[[package]]
-name = "redox_syscall"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4722d768eff46b75989dd134e5c353f0d6296e5aaa3132e776cbdb56be7731aa"
-dependencies = [
- "bitflags 1.3.2",
-]
-
 [[package]]
 name = "regex"
 version = "1.10.2"
@@ -549,7 +527,7 @@ dependencies = [
  "io-lifetimes",
  "libc",
  "linux-raw-sys 0.3.8",
- "windows-sys 0.48.0",
+ "windows-sys",
 ]
 
 [[package]]
@@ -562,7 +540,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys 0.4.12",
- "windows-sys 0.48.0",
+ "windows-sys",
 ]
 
 [[package]]
@@ -642,9 +620,9 @@ dependencies = [
  "autocfg",
  "cfg-if",
  "fastrand",
- "redox_syscall 0.3.5",
+ "redox_syscall",
  "rustix 0.37.20",
- "windows-sys 0.48.0",
+ "windows-sys",
 ]
 
 [[package]]
@@ -774,16 +752,7 @@ version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
 dependencies = [
- "windows-targets 0.48.0",
-]
-
-[[package]]
-name = "windows-sys"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
-dependencies = [
- "windows-targets 0.52.0",
+ "windows-targets",
 ]
 
 [[package]]
@@ -792,28 +761,13 @@ version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
 dependencies = [
- "windows_aarch64_gnullvm 0.48.0",
- "windows_aarch64_msvc 0.48.0",
- "windows_i686_gnu 0.48.0",
- "windows_i686_msvc 0.48.0",
- "windows_x86_64_gnu 0.48.0",
- "windows_x86_64_gnullvm 0.48.0",
- "windows_x86_64_msvc 0.48.0",
-]
-
-[[package]]
-name = "windows-targets"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a18201040b24831fbb9e4eb208f8892e1f50a37feb53cc7ff887feb8f50e7cd"
-dependencies = [
- "windows_aarch64_gnullvm 0.52.0",
- "windows_aarch64_msvc 0.52.0",
- "windows_i686_gnu 0.52.0",
- "windows_i686_msvc 0.52.0",
- "windows_x86_64_gnu 0.52.0",
- "windows_x86_64_gnullvm 0.52.0",
- "windows_x86_64_msvc 0.52.0",
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
 ]
 
 [[package]]
@@ -822,80 +776,38 @@ version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
 
-[[package]]
-name = "windows_aarch64_gnullvm"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb7764e35d4db8a7921e09562a0304bf2f93e0a51bfccee0bd0bb0b666b015ea"
-
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
 
-[[package]]
-name = "windows_aarch64_msvc"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbaa0368d4f1d2aaefc55b6fcfee13f41544ddf36801e793edbbfd7d7df075ef"
-
 [[package]]
 name = "windows_i686_gnu"
 version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
 
-[[package]]
-name = "windows_i686_gnu"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a28637cb1fa3560a16915793afb20081aba2c92ee8af57b4d5f28e4b3e7df313"
-
 [[package]]
 name = "windows_i686_msvc"
 version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
 
-[[package]]
-name = "windows_i686_msvc"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ffe5e8e31046ce6230cc7215707b816e339ff4d4d67c65dffa206fd0f7aa7b9a"
-
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
 
-[[package]]
-name = "windows_x86_64_gnu"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d6fa32db2bc4a2f5abeacf2b69f7992cd09dca97498da74a151a3132c26befd"
-
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
 
-[[package]]
-name = "windows_x86_64_gnullvm"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a657e1e9d3f514745a572a6846d3c7aa7dbe1658c056ed9c3344c4109a6949e"
-
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
-
-[[package]]
-name = "windows_x86_64_msvc"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dff9641d1cd4be8d1a070daf9e3773c5f67e78b4d9d42263020c057706765c04"
diff --git a/Cargo.toml b/Cargo.toml
index b91b120..2cbcda8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ readme = "README.md"
 repository = "https://github.com/evmar/n2"
 # https://github.com/evmar/n2/issues/74
 # Note: if we bump this, may need to bump .github/workflows/ci.yml version too.
-rust-version = "1.70.0"
+rust-version = "1.75.0"
 description = "a ninja compatible build system"
 
 [dependencies]
@@ -37,7 +37,6 @@ jemallocator = "0.5.0"
 [dev-dependencies]
 tempfile = "3.6.0"
 criterion = { version = "0.5.1", features = ["html_reports"] }
-filetime = "0.2"
 
 [profile.release]
 debug = true
diff --git a/tests/e2e/mod.rs b/tests/e2e/mod.rs
index a1e7e7f..486076b 100644
--- a/tests/e2e/mod.rs
+++ b/tests/e2e/mod.rs
@@ -80,7 +80,8 @@ impl TestSpace {
     pub fn sub_mtime(&self, path: &str, dur: std::time::Duration) -> anyhow::Result<()> {
         let path = self.dir.path().join(path);
         let t = std::time::SystemTime::now() - dur;
-        filetime::set_file_mtime(path, filetime::FileTime::from_system_time(t))?;
+        let f = std::fs::File::options().write(true).open(path)?;
+        f.set_modified(t)?;
         Ok(())
     }