diff --git a/Cargo.lock b/Cargo.lock
index d015e15345..c4d5ae3b3a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2516,18 +2516,14 @@ version = "0.22.0"
 dependencies = [
  "anyhow",
  "bitflags",
- "cap-fs-ext",
  "cap-rand",
  "cap-std",
- "cap-time-ext",
  "cfg-if 1.0.0",
- "fs-set-times",
  "libc",
  "system-interface",
  "thiserror",
  "tracing",
  "wiggle",
- "yanix 0.22.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
diff --git a/crates/wasi-c2/Cargo.toml b/crates/wasi-c2/Cargo.toml
index 848e69051d..de412a5954 100644
--- a/crates/wasi-c2/Cargo.toml
+++ b/crates/wasi-c2/Cargo.toml
@@ -26,13 +26,9 @@ wiggle = { path = "../wiggle", default-features = false, version = "0.22.0" }
 tracing = "0.1.19"
 system-interface = { version = "0.5", features = ["cap_std_impls"] }
 cap-std = "0.9"
-cap-fs-ext = "0.9"
-cap-time-ext = "0.9"
 cap-rand = "0.9"
-fs-set-times = "0.2.2"
 cfg-if = "1"
 bitflags = "1.2"
-yanix = "0.22"
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/crates/wasi-c2/cap-std-sync/src/clocks.rs b/crates/wasi-c2/cap-std-sync/src/clocks.rs
new file mode 100644
index 0000000000..3d81929534
--- /dev/null
+++ b/crates/wasi-c2/cap-std-sync/src/clocks.rs
@@ -0,0 +1,46 @@
+use cap_std::time::{Duration, Instant, SystemTime};
+use cap_time_ext::{MonotonicClockExt, SystemClockExt};
+use wasi_c2::clocks::{WasiClocks, WasiMonotonicClock, WasiSystemClock};
+
+pub struct SystemClock(cap_std::time::SystemClock);
+
+impl SystemClock {
+    pub unsafe fn new() -> Self {
+        SystemClock(cap_std::time::SystemClock::new())
+    }
+}
+impl WasiSystemClock for SystemClock {
+    fn resolution(&self) -> Duration {
+        self.0.resolution()
+    }
+    fn now(&self, precision: Duration) -> SystemTime {
+        self.0.now_with(precision)
+    }
+}
+
+pub struct MonotonicClock(cap_std::time::MonotonicClock);
+impl MonotonicClock {
+    pub unsafe fn new() -> Self {
+        MonotonicClock(cap_std::time::MonotonicClock::new())
+    }
+}
+impl WasiMonotonicClock for MonotonicClock {
+    fn resolution(&self) -> Duration {
+        self.0.resolution()
+    }
+    fn now(&self, precision: Duration) -> Instant {
+        self.0.now_with(precision)
+    }
+}
+
+pub fn clocks() -> WasiClocks {
+    let system = Box::new(unsafe { SystemClock::new() });
+    let monotonic = unsafe { cap_std::time::MonotonicClock::new() };
+    let creation_time = monotonic.now();
+    let monotonic = Box::new(MonotonicClock(monotonic));
+    WasiClocks {
+        system,
+        monotonic,
+        creation_time,
+    }
+}
diff --git a/crates/wasi-c2/cap-std-sync/src/dir.rs b/crates/wasi-c2/cap-std-sync/src/dir.rs
index 50d61fe1e9..42c2b111cc 100644
--- a/crates/wasi-c2/cap-std-sync/src/dir.rs
+++ b/crates/wasi-c2/cap-std-sync/src/dir.rs
@@ -197,7 +197,7 @@ impl WasiDir for Dir {
     fn hard_link(
         &self,
         src_path: &str,
-        symlink_follow: bool,
+        symlink_follow: bool, // XXX not in cap-std yet
         target_dir: &dyn WasiDir,
         target_path: &str,
     ) -> Result<(), Error> {
@@ -213,10 +213,22 @@ impl WasiDir for Dir {
     fn set_times(
         &self,
         path: &str,
-        atime: Option<SystemTimeSpec>,
-        mtime: Option<SystemTimeSpec>,
+        atime: Option<wasi_c2::SystemTimeSpec>,
+        mtime: Option<wasi_c2::SystemTimeSpec>,
     ) -> Result<(), Error> {
-        self.0.set_times(Path::new(path), atime, mtime)?;
+        self.0.set_times(
+            Path::new(path),
+            convert_systimespec(atime),
+            convert_systimespec(mtime),
+        )?;
         Ok(())
     }
 }
+
+fn convert_systimespec(t: Option<wasi_c2::SystemTimeSpec>) -> Option<SystemTimeSpec> {
+    match t {
+        Some(wasi_c2::SystemTimeSpec::Absolute(t)) => Some(SystemTimeSpec::Absolute(t)),
+        Some(wasi_c2::SystemTimeSpec::SymbolicNow) => Some(SystemTimeSpec::SymbolicNow),
+        None => None,
+    }
+}
diff --git a/crates/wasi-c2/cap-std-sync/src/file.rs b/crates/wasi-c2/cap-std-sync/src/file.rs
index 3fb8c90f3b..5502335ba1 100644
--- a/crates/wasi-c2/cap-std-sync/src/file.rs
+++ b/crates/wasi-c2/cap-std-sync/src/file.rs
@@ -68,10 +68,11 @@ impl WasiFile for File {
     }
     fn set_times(
         &self,
-        atime: Option<SystemTimeSpec>,
-        mtime: Option<SystemTimeSpec>,
+        atime: Option<wasi_c2::SystemTimeSpec>,
+        mtime: Option<wasi_c2::SystemTimeSpec>,
     ) -> Result<(), Error> {
-        self.0.set_times(atime, mtime)?;
+        self.0
+            .set_times(convert_systimespec(atime), convert_systimespec(mtime))?;
         Ok(())
     }
     fn read_vectored(&self, bufs: &mut [io::IoSliceMut]) -> Result<u64, Error> {
@@ -93,9 +94,6 @@ impl WasiFile for File {
     fn seek(&self, pos: std::io::SeekFrom) -> Result<u64, Error> {
         Ok(self.0.seek(pos)?)
     }
-    fn stream_position(&self) -> Result<u64, Error> {
-        Ok(self.0.stream_position()?)
-    }
     fn peek(&self, buf: &mut [u8]) -> Result<u64, Error> {
         let n = self.0.peek(buf)?;
         Ok(n.try_into().map_err(|_| Error::Overflow)?)
@@ -145,3 +143,10 @@ impl AsRawFd for File {
         self.0.as_raw_fd()
     }
 }
+pub fn convert_systimespec(t: Option<wasi_c2::SystemTimeSpec>) -> Option<SystemTimeSpec> {
+    match t {
+        Some(wasi_c2::SystemTimeSpec::Absolute(t)) => Some(SystemTimeSpec::Absolute(t.into_std())),
+        Some(wasi_c2::SystemTimeSpec::SymbolicNow) => Some(SystemTimeSpec::SymbolicNow),
+        None => None,
+    }
+}
diff --git a/crates/wasi-c2/cap-std-sync/src/lib.rs b/crates/wasi-c2/cap-std-sync/src/lib.rs
index 75e5ed4e71..0d4063f08a 100644
--- a/crates/wasi-c2/cap-std-sync/src/lib.rs
+++ b/crates/wasi-c2/cap-std-sync/src/lib.rs
@@ -1,3 +1,4 @@
+pub mod clocks;
 pub mod dir;
 pub mod file;
 pub mod sched;
@@ -7,7 +8,7 @@ use cap_rand::RngCore;
 use std::cell::RefCell;
 use std::path::Path;
 use std::rc::Rc;
-use wasi_c2::{clocks::WasiClocks, table::Table, Error, WasiCtx, WasiFile};
+use wasi_c2::{table::Table, Error, WasiCtx, WasiFile};
 
 pub struct WasiCtxBuilder(wasi_c2::WasiCtxBuilder);
 
@@ -15,7 +16,7 @@ impl WasiCtxBuilder {
     pub fn new() -> Self {
         WasiCtxBuilder(WasiCtx::builder(
             random(),
-            clocks(),
+            clocks::clocks(),
             Box::new(sched::SyncSched),
             Rc::new(RefCell::new(Table::new())),
         ))
@@ -51,18 +52,6 @@ impl WasiCtxBuilder {
     }
 }
 
-pub fn clocks() -> WasiClocks {
-    let system = Box::new(unsafe { cap_std::time::SystemClock::new() });
-    let monotonic = unsafe { cap_std::time::MonotonicClock::new() };
-    let creation_time = monotonic.now();
-    let monotonic = Box::new(monotonic);
-    WasiClocks {
-        system,
-        monotonic,
-        creation_time,
-    }
-}
-
 pub fn random() -> RefCell<Box<dyn RngCore>> {
     RefCell::new(Box::new(unsafe { cap_rand::rngs::OsRng::default() }))
 }
diff --git a/crates/wasi-c2/cap-std-sync/src/stdio.rs b/crates/wasi-c2/cap-std-sync/src/stdio.rs
index ad6e61cb03..40c9616003 100644
--- a/crates/wasi-c2/cap-std-sync/src/stdio.rs
+++ b/crates/wasi-c2/cap-std-sync/src/stdio.rs
@@ -1,3 +1,4 @@
+use crate::file::convert_systimespec;
 use fs_set_times::SetTimes;
 use std::any::Any;
 use std::convert::TryInto;
@@ -87,19 +88,16 @@ macro_rules! wasi_file_impl {
             fn seek(&self, pos: std::io::SeekFrom) -> Result<u64, Error> {
                 Ok(self.0.seek(pos)?)
             }
-            fn stream_position(&self) -> Result<u64, Error> {
-                Ok(self.0.stream_position()?)
-            }
             fn peek(&self, buf: &mut [u8]) -> Result<u64, Error> {
                 let n = self.0.peek(buf)?;
                 Ok(n.try_into().map_err(|_| Error::Overflow)?)
             }
             fn set_times(
                 &self,
-                atime: Option<fs_set_times::SystemTimeSpec>,
-                mtime: Option<fs_set_times::SystemTimeSpec>,
+                atime: Option<wasi_c2::SystemTimeSpec>,
+                mtime: Option<wasi_c2::SystemTimeSpec>,
             ) -> Result<(), Error> {
-                self.0.set_times(atime, mtime)?;
+                self.0.set_times(convert_systimespec(atime), convert_systimespec(mtime))?;
                 Ok(())
             }
             $additional
diff --git a/crates/wasi-c2/src/clocks.rs b/crates/wasi-c2/src/clocks.rs
index 729ced1dd5..babf0acff4 100644
--- a/crates/wasi-c2/src/clocks.rs
+++ b/crates/wasi-c2/src/clocks.rs
@@ -1,34 +1,20 @@
-use cap_std::time::{Duration, Instant, MonotonicClock, SystemClock, SystemTime};
-use cap_time_ext::{MonotonicClockExt, SystemClockExt};
+use cap_std::time::{Duration, Instant, SystemTime};
+
+pub enum SystemTimeSpec {
+    SymbolicNow,
+    Absolute(SystemTime),
+}
 
 pub trait WasiSystemClock {
     fn resolution(&self) -> Duration;
     fn now(&self, precision: Duration) -> SystemTime;
 }
 
-impl WasiSystemClock for SystemClock {
-    fn resolution(&self) -> Duration {
-        SystemClockExt::resolution(self)
-    }
-    fn now(&self, precision: Duration) -> SystemTime {
-        self.now_with(precision)
-    }
-}
-
 pub trait WasiMonotonicClock {
     fn resolution(&self) -> Duration;
     fn now(&self, precision: Duration) -> Instant;
 }
 
-impl WasiMonotonicClock for MonotonicClock {
-    fn resolution(&self) -> Duration {
-        MonotonicClockExt::resolution(self)
-    }
-    fn now(&self, precision: Duration) -> Instant {
-        self.now_with(precision)
-    }
-}
-
 pub struct WasiClocks {
     pub system: Box<dyn WasiSystemClock>,
     pub monotonic: Box<dyn WasiMonotonicClock>,
diff --git a/crates/wasi-c2/src/dir.rs b/crates/wasi-c2/src/dir.rs
index cb46c916e5..bdc0811865 100644
--- a/crates/wasi-c2/src/dir.rs
+++ b/crates/wasi-c2/src/dir.rs
@@ -1,7 +1,6 @@
-use crate::error::Error;
 use crate::file::{FdFlags, FileCaps, FileType, Filestat, OFlags, WasiFile};
+use crate::{Error, SystemTimeSpec};
 use bitflags::bitflags;
-use cap_fs_ext::SystemTimeSpec;
 use std::any::Any;
 use std::cell::Ref;
 use std::ops::Deref;
diff --git a/crates/wasi-c2/src/file.rs b/crates/wasi-c2/src/file.rs
index 3521d21b53..97bb939eb7 100644
--- a/crates/wasi-c2/src/file.rs
+++ b/crates/wasi-c2/src/file.rs
@@ -1,42 +1,43 @@
-use crate::Error;
+use crate::{Error, SystemTimeSpec};
 use bitflags::bitflags;
-use fs_set_times::SystemTimeSpec;
 use std::any::Any;
 use std::cell::Ref;
 use std::ops::Deref;
 
 pub trait WasiFile {
     fn as_any(&self) -> &dyn Any;
-    fn datasync(&self) -> Result<(), Error>;
-    fn sync(&self) -> Result<(), Error>;
-    fn get_filetype(&self) -> Result<FileType, Error>;
-    fn get_fdflags(&self) -> Result<FdFlags, Error>;
+    fn datasync(&self) -> Result<(), Error>; // write op
+    fn sync(&self) -> Result<(), Error>; // file op
+    fn get_filetype(&self) -> Result<FileType, Error>; // file op
+    fn get_fdflags(&self) -> Result<FdFlags, Error>; // file op
     fn set_fdflags(&self, _flags: FdFlags) -> Result<(), Error>;
-    fn get_filestat(&self) -> Result<Filestat, Error>;
-    fn set_filestat_size(&self, _size: u64) -> Result<(), Error>;
+    fn get_filestat(&self) -> Result<Filestat, Error>; // split out get_length as a read & write op, rest is a file op
+    fn set_filestat_size(&self, _size: u64) -> Result<(), Error>; // write op
     fn advise(
         &self,
         offset: u64,
         len: u64,
         advice: system_interface::fs::Advice,
-    ) -> Result<(), Error>;
-    fn allocate(&self, offset: u64, len: u64) -> Result<(), Error>;
+    ) -> Result<(), Error>; // file op
+    fn allocate(&self, offset: u64, len: u64) -> Result<(), Error>; // write op
     fn set_times(
         &self,
         atime: Option<SystemTimeSpec>,
         mtime: Option<SystemTimeSpec>,
     ) -> Result<(), Error>;
-    fn read_vectored(&self, bufs: &mut [std::io::IoSliceMut]) -> Result<u64, Error>;
+    fn read_vectored(&self, bufs: &mut [std::io::IoSliceMut]) -> Result<u64, Error>; // read op
     fn read_vectored_at(&self, bufs: &mut [std::io::IoSliceMut], offset: u64)
-        -> Result<u64, Error>;
-    fn write_vectored(&self, bufs: &[std::io::IoSlice]) -> Result<u64, Error>;
-    fn write_vectored_at(&self, bufs: &[std::io::IoSlice], offset: u64) -> Result<u64, Error>;
-    fn seek(&self, pos: std::io::SeekFrom) -> Result<u64, Error>;
-    fn stream_position(&self) -> Result<u64, Error>;
-    fn peek(&self, buf: &mut [u8]) -> Result<u64, Error>;
-    fn num_ready_bytes(&self) -> Result<u64, Error>;
+        -> Result<u64, Error>; // file op
+    fn write_vectored(&self, bufs: &[std::io::IoSlice]) -> Result<u64, Error>; // write op
+    fn write_vectored_at(&self, bufs: &[std::io::IoSlice], offset: u64) -> Result<u64, Error>; // file op
+    fn seek(&self, pos: std::io::SeekFrom) -> Result<u64, Error>; // file op that generates a new stream from a file will supercede this
+    fn peek(&self, buf: &mut [u8]) -> Result<u64, Error>; // read op
+    fn num_ready_bytes(&self) -> Result<u64, Error>; // read op
 }
 
+// XXX we will add pipes to wasi - lets add it to this internal enum and present them as
+// Unknown to old wasis
+// XXX put the enum variants in same order as WASI so conversion funcs are no-op
 #[derive(Debug, Copy, Clone)]
 pub enum FileType {
     Directory,
@@ -74,7 +75,7 @@ pub struct Filestat {
     pub inode: u64,
     pub filetype: FileType,
     pub nlink: u64,
-    pub size: u64,
+    pub size: u64, // this is a read field, the rest are file fields
     pub atim: Option<std::time::SystemTime>,
     pub mtim: Option<std::time::SystemTime>,
     pub ctim: Option<std::time::SystemTime>,
diff --git a/crates/wasi-c2/src/lib.rs b/crates/wasi-c2/src/lib.rs
index 6fbb269df1..7cd5c8325f 100644
--- a/crates/wasi-c2/src/lib.rs
+++ b/crates/wasi-c2/src/lib.rs
@@ -12,7 +12,7 @@ pub mod snapshots;
 mod string_array;
 pub mod table;
 
-pub use cap_fs_ext::SystemTimeSpec;
+pub use clocks::SystemTimeSpec;
 pub use ctx::{WasiCtx, WasiCtxBuilder};
 pub use dir::{DirCaps, ReaddirCursor, ReaddirEntity, WasiDir};
 pub use error::Error;
diff --git a/crates/wasi-c2/src/pipe.rs b/crates/wasi-c2/src/pipe.rs
index 55c6c6ce08..a65acd8f1e 100644
--- a/crates/wasi-c2/src/pipe.rs
+++ b/crates/wasi-c2/src/pipe.rs
@@ -9,8 +9,10 @@
 //! Some convenience constructors are included for common backing types like `Vec<u8>` and `String`,
 //! but the virtual pipes can be instantiated with any `Read` or `Write` type.
 //!
-use crate::file::{FdFlags, FileType, Filestat, WasiFile};
-use crate::Error;
+use crate::{
+    file::{FdFlags, FileType, Filestat, WasiFile},
+    Error, SystemTimeSpec,
+};
 use std::any::Any;
 use std::convert::TryInto;
 use std::io::{self, Read, Write};
@@ -152,16 +154,13 @@ impl<R: Read + Any> WasiFile for ReadPipe<R> {
     fn seek(&self, pos: std::io::SeekFrom) -> Result<u64, Error> {
         Err(Error::Badf)
     }
-    fn stream_position(&self) -> Result<u64, Error> {
-        Err(Error::Badf)
-    }
     fn peek(&self, buf: &mut [u8]) -> Result<u64, Error> {
         Err(Error::Badf)
     }
     fn set_times(
         &self,
-        atime: Option<fs_set_times::SystemTimeSpec>,
-        mtime: Option<fs_set_times::SystemTimeSpec>,
+        atime: Option<SystemTimeSpec>,
+        mtime: Option<SystemTimeSpec>,
     ) -> Result<(), Error> {
         Err(Error::Badf)
     }
@@ -291,16 +290,13 @@ impl<W: Write + Any> WasiFile for WritePipe<W> {
     fn seek(&self, pos: std::io::SeekFrom) -> Result<u64, Error> {
         Err(Error::Badf)
     }
-    fn stream_position(&self) -> Result<u64, Error> {
-        Err(Error::Badf)
-    }
     fn peek(&self, buf: &mut [u8]) -> Result<u64, Error> {
         Err(Error::Badf)
     }
     fn set_times(
         &self,
-        atime: Option<fs_set_times::SystemTimeSpec>,
-        mtime: Option<fs_set_times::SystemTimeSpec>,
+        atime: Option<SystemTimeSpec>,
+        mtime: Option<SystemTimeSpec>,
     ) -> Result<(), Error> {
         Err(Error::Badf)
     }
diff --git a/crates/wasi-c2/src/snapshots/preview_1.rs b/crates/wasi-c2/src/snapshots/preview_1.rs
index 53d973a834..68cab65da9 100644
--- a/crates/wasi-c2/src/snapshots/preview_1.rs
+++ b/crates/wasi-c2/src/snapshots/preview_1.rs
@@ -1,14 +1,17 @@
 #![allow(unused_variables)]
-use crate::dir::{
-    DirCaps, DirEntry, DirEntryExt, DirFdStat, ReaddirCursor, ReaddirEntity, TableDirExt,
+use crate::{
+    dir::{DirCaps, DirEntry, DirEntryExt, DirFdStat, ReaddirCursor, ReaddirEntity, TableDirExt},
+    file::{
+        FdFlags, FdStat, FileCaps, FileEntry, FileEntryExt, FileType, Filestat, OFlags,
+        TableFileExt,
+    },
+    sched::{
+        subscription::{RwEventFlags, SubscriptionResult},
+        Poll,
+    },
+    Error, SystemTimeSpec, WasiCtx,
 };
-use crate::file::{
-    FdFlags, FdStat, FileCaps, FileEntry, FileEntryExt, FileType, Filestat, OFlags, TableFileExt,
-};
-use crate::sched::subscription::{RwEventFlags, SubscriptionResult};
-use crate::sched::Poll;
-use crate::{Error, WasiCtx};
-use fs_set_times::SystemTimeSpec;
+use cap_std::time::{Duration, SystemClock};
 use std::cell::{Ref, RefMut};
 use std::convert::{TryFrom, TryInto};
 use std::io::{IoSlice, IoSliceMut};
@@ -172,7 +175,6 @@ impl<'a> wasi_snapshot_preview1::WasiSnapshotPreview1 for WasiCtx {
         id: types::Clockid,
         precision: types::Timestamp,
     ) -> Result<types::Timestamp, Error> {
-        use cap_std::time::Duration;
         let precision = Duration::from_nanos(precision);
         match id {
             types::Clockid::Realtime => {
@@ -344,55 +346,31 @@ impl<'a> wasi_snapshot_preview1::WasiSnapshotPreview1 for WasiCtx {
         if (set_atim && set_atim_now) || (set_mtim && set_mtim_now) {
             return Err(Error::Inval);
         }
+        let atim = if set_atim {
+            Some(SystemTimeSpec::Absolute(
+                SystemClock::UNIX_EPOCH + Duration::from_nanos(atim),
+            ))
+        } else if set_atim_now {
+            Some(SystemTimeSpec::SymbolicNow)
+        } else {
+            None
+        };
+        let mtim = if set_mtim {
+            Some(SystemTimeSpec::Absolute(
+                SystemClock::UNIX_EPOCH + Duration::from_nanos(mtim),
+            ))
+        } else if set_mtim_now {
+            Some(SystemTimeSpec::SymbolicNow)
+        } else {
+            None
+        };
         if table.is::<FileEntry>(fd) {
-            use std::time::{Duration, UNIX_EPOCH};
-            let atim = if set_atim {
-                Some(SystemTimeSpec::Absolute(
-                    UNIX_EPOCH + Duration::from_nanos(atim),
-                ))
-            } else if set_atim_now {
-                Some(SystemTimeSpec::SymbolicNow)
-            } else {
-                None
-            };
-            let mtim = if set_mtim {
-                Some(SystemTimeSpec::Absolute(
-                    UNIX_EPOCH + Duration::from_nanos(mtim),
-                ))
-            } else if set_mtim_now {
-                Some(SystemTimeSpec::SymbolicNow)
-            } else {
-                None
-            };
-
             table
                 .get_file(fd)
                 .expect("checked that entry is file")
                 .get_cap(FileCaps::FILESTAT_SET_TIMES)?
                 .set_times(atim, mtim)
         } else if table.is::<DirEntry>(fd) {
-            use cap_std::time::{Duration, SystemClock};
-
-            use cap_fs_ext::SystemTimeSpec;
-            let atim = if set_atim {
-                Some(SystemTimeSpec::Absolute(
-                    SystemClock::UNIX_EPOCH + Duration::from_nanos(atim),
-                ))
-            } else if set_atim_now {
-                Some(SystemTimeSpec::SymbolicNow)
-            } else {
-                None
-            };
-            let mtim = if set_mtim {
-                Some(SystemTimeSpec::Absolute(
-                    SystemClock::UNIX_EPOCH + Duration::from_nanos(mtim),
-                ))
-            } else if set_mtim_now {
-                Some(SystemTimeSpec::SymbolicNow)
-            } else {
-                None
-            };
-
             table
                 .get_dir(fd)
                 .expect("checked that entry is dir")
@@ -599,6 +577,7 @@ impl<'a> wasi_snapshot_preview1::WasiSnapshotPreview1 for WasiCtx {
     }
 
     fn fd_tell(&self, fd: types::Fd) -> Result<types::Filesize, Error> {
+        // XXX should this be stream_position?
         let offset = self
             .table()
             .get_file(u32::from(fd))?
@@ -694,7 +673,6 @@ impl<'a> wasi_snapshot_preview1::WasiSnapshotPreview1 for WasiCtx {
         mtim: types::Timestamp,
         fst_flags: types::Fstflags,
     ) -> Result<(), Error> {
-        // XXX DRY these are in fd_filestat_set_times twice!
         let set_atim = fst_flags.contains(types::Fstflags::ATIM);
         let set_atim_now = fst_flags.contains(types::Fstflags::ATIM_NOW);
         let set_mtim = fst_flags.contains(types::Fstflags::MTIM);
@@ -702,27 +680,19 @@ impl<'a> wasi_snapshot_preview1::WasiSnapshotPreview1 for WasiCtx {
         if (set_atim && set_atim_now) || (set_mtim && set_mtim_now) {
             return Err(Error::Inval);
         }
-        use cap_fs_ext::SystemTimeSpec;
-        use cap_std::time::{Duration, SystemClock};
-        let atim = if set_atim {
-            Some(SystemTimeSpec::Absolute(
-                SystemClock::UNIX_EPOCH + Duration::from_nanos(atim),
-            ))
-        } else if set_atim_now {
-            Some(SystemTimeSpec::SymbolicNow)
-        } else {
-            None
-        };
-        let mtim = if set_mtim {
-            Some(SystemTimeSpec::Absolute(
-                SystemClock::UNIX_EPOCH + Duration::from_nanos(mtim),
-            ))
-        } else if set_mtim_now {
-            Some(SystemTimeSpec::SymbolicNow)
-        } else {
-            None
-        };
-
+        fn systimespec(set: bool, ts: types::Timestamp, now: bool) -> Option<SystemTimeSpec> {
+            if set {
+                Some(SystemTimeSpec::Absolute(
+                    SystemClock::UNIX_EPOCH + Duration::from_nanos(ts),
+                ))
+            } else if now {
+                Some(SystemTimeSpec::SymbolicNow)
+            } else {
+                None
+            }
+        }
+        let atim = systimespec(set_atim, atim, set_atim_now);
+        let mtim = systimespec(set_mtim, mtim, set_mtim_now);
         self.table()
             .get_dir(u32::from(dirfd))?
             .get_cap(DirCaps::PATH_FILESTAT_SET_TIMES)?
@@ -893,7 +863,6 @@ impl<'a> wasi_snapshot_preview1::WasiSnapshotPreview1 for WasiCtx {
             return Err(Error::Inval);
         }
 
-        use cap_std::time::Duration;
         let table = self.table();
         let mut poll = Poll::new();