diff --git a/src/entry.rs b/src/entry.rs
index cce39d45..f79636ac 100644
--- a/src/entry.rs
+++ b/src/entry.rs
@@ -569,7 +569,7 @@ impl<'a> EntryFields<'a> {
             }
             return Ok(Unpacked::__Nonexhaustive);
 
-            #[cfg(target_arch = "wasm32")]
+            #[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
             #[allow(unused_variables)]
             fn symlink(src: &Path, dst: &Path) -> io::Result<()> {
                 Err(io::Error::new(io::ErrorKind::Other, "Not implemented"))
@@ -746,7 +746,7 @@ impl<'a> EntryFields<'a> {
         }
 
         // Windows does not support posix numeric ownership IDs
-        #[cfg(any(windows, target_arch = "wasm32"))]
+        #[cfg(not(unix))]
         fn _set_ownerships(
             _: &Path,
             _: &Option<&mut std::fs::File>,
@@ -816,7 +816,7 @@ impl<'a> EntryFields<'a> {
             }
         }
 
-        #[cfg(target_arch = "wasm32")]
+        #[cfg(all(target_arch = "wasm32", not(all(unix, feature = "xattr"))))]
         #[allow(unused_variables)]
         fn _set_perms(
             dst: &Path,
@@ -869,7 +869,11 @@ impl<'a> EntryFields<'a> {
         }
         // Windows does not completely support posix xattrs
         // https://en.wikipedia.org/wiki/Extended_file_attributes#Windows_NT
-        #[cfg(any(windows, not(feature = "xattr"), target_arch = "wasm32"))]
+        #[cfg(any(
+            windows,
+            not(feature = "xattr"),
+            all(target_arch = "wasm32", not(target_os = "emscripten"))
+        ))]
         fn set_xattrs(_: &mut EntryFields, _: &Path) -> io::Result<()> {
             Ok(())
         }
diff --git a/src/header.rs b/src/header.rs
index 7e507fc7..1c37f8f0 100644
--- a/src/header.rs
+++ b/src/header.rs
@@ -732,7 +732,7 @@ impl Header {
         }
     }
 
-    #[cfg(target_arch = "wasm32")]
+    #[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
     #[allow(unused_variables)]
     fn fill_platform_from(&mut self, meta: &fs::Metadata, mode: HeaderMode) {
         unimplemented!();
@@ -1546,7 +1546,7 @@ fn copy_path_into(mut slot: &mut [u8], path: &Path, is_link_name: bool) -> io::R
     }
 }
 
-#[cfg(target_arch = "wasm32")]
+#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
 fn ends_with_slash(p: &Path) -> bool {
     p.to_string_lossy().ends_with('/')
 }
@@ -1562,7 +1562,7 @@ fn ends_with_slash(p: &Path) -> bool {
     p.as_os_str().as_bytes().ends_with(&[b'/'])
 }
 
-#[cfg(any(windows, target_arch = "wasm32"))]
+#[cfg(any(windows, all(target_arch = "wasm32", not(target_os = "emscripten"))))]
 pub fn path2bytes(p: &Path) -> io::Result<Cow<[u8]>> {
     p.as_os_str()
         .to_str()
@@ -1624,19 +1624,19 @@ pub fn bytes2path(bytes: Cow<[u8]>) -> io::Result<Cow<Path>> {
     })
 }
 
-#[cfg(target_arch = "wasm32")]
+#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
 pub fn bytes2path(bytes: Cow<[u8]>) -> io::Result<Cow<Path>> {
     Ok(match bytes {
         Cow::Borrowed(bytes) => {
-            Cow::Borrowed({ Path::new(str::from_utf8(bytes).map_err(invalid_utf8)?) })
-        }
-        Cow::Owned(bytes) => {
-            Cow::Owned({ PathBuf::from(String::from_utf8(bytes).map_err(invalid_utf8)?) })
+            Cow::Borrowed(Path::new(str::from_utf8(bytes).map_err(invalid_utf8)?))
         }
+        Cow::Owned(bytes) => Cow::Owned(PathBuf::from(
+            String::from_utf8(bytes).map_err(invalid_utf8)?,
+        )),
     })
 }
 
-#[cfg(target_arch = "wasm32")]
+#[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
 fn invalid_utf8<T>(_: T) -> io::Error {
     io::Error::new(io::ErrorKind::InvalidData, "Invalid utf-8")
 }