diff --git a/library/std/src/os/unix/process.rs b/library/std/src/os/unix/process.rs
index d95bc9b15c9c4..9a6778c0e869b 100644
--- a/library/std/src/os/unix/process.rs
+++ b/library/std/src/os/unix/process.rs
@@ -24,8 +24,8 @@ pub trait CommandExt: Sealed {
     #[stable(feature = "rust1", since = "1.0.0")]
     fn uid(
         &mut self,
-        #[cfg(not(target_os = "vxworks"))] id: u32,
-        #[cfg(target_os = "vxworks")] id: u16,
+        #[cfg(not(any(target_os = "vxworks", target_os = "espidf")))] id: u32,
+        #[cfg(any(target_os = "vxworks", target_os = "espidf"))] id: u16,
     ) -> &mut process::Command;
 
     /// Similar to `uid`, but sets the group ID of the child process. This has
@@ -33,8 +33,8 @@ pub trait CommandExt: Sealed {
     #[stable(feature = "rust1", since = "1.0.0")]
     fn gid(
         &mut self,
-        #[cfg(not(target_os = "vxworks"))] id: u32,
-        #[cfg(target_os = "vxworks")] id: u16,
+        #[cfg(not(any(target_os = "vxworks", target_os = "espidf")))] id: u32,
+        #[cfg(any(target_os = "vxworks", target_os = "espidf"))] id: u16,
     ) -> &mut process::Command;
 
     /// Sets the supplementary group IDs for the calling process. Translates to
@@ -42,8 +42,8 @@ pub trait CommandExt: Sealed {
     #[unstable(feature = "setgroups", issue = "90747")]
     fn groups(
         &mut self,
-        #[cfg(not(target_os = "vxworks"))] groups: &[u32],
-        #[cfg(target_os = "vxworks")] groups: &[u16],
+        #[cfg(not(any(target_os = "vxworks", target_os = "espidf")))] groups: &[u32],
+        #[cfg(any(target_os = "vxworks", target_os = "espidf"))] groups: &[u16],
     ) -> &mut process::Command;
 
     /// Schedules a closure to be run just before the `exec` function is
@@ -160,8 +160,8 @@ pub trait CommandExt: Sealed {
 impl CommandExt for process::Command {
     fn uid(
         &mut self,
-        #[cfg(not(target_os = "vxworks"))] id: u32,
-        #[cfg(target_os = "vxworks")] id: u16,
+        #[cfg(not(any(target_os = "vxworks", target_os = "espidf")))] id: u32,
+        #[cfg(any(target_os = "vxworks", target_os = "espidf"))] id: u16,
     ) -> &mut process::Command {
         self.as_inner_mut().uid(id);
         self
@@ -169,8 +169,8 @@ impl CommandExt for process::Command {
 
     fn gid(
         &mut self,
-        #[cfg(not(target_os = "vxworks"))] id: u32,
-        #[cfg(target_os = "vxworks")] id: u16,
+        #[cfg(not(any(target_os = "vxworks", target_os = "espidf")))] id: u32,
+        #[cfg(any(target_os = "vxworks", target_os = "espidf"))] id: u16,
     ) -> &mut process::Command {
         self.as_inner_mut().gid(id);
         self
@@ -178,8 +178,8 @@ impl CommandExt for process::Command {
 
     fn groups(
         &mut self,
-        #[cfg(not(target_os = "vxworks"))] groups: &[u32],
-        #[cfg(target_os = "vxworks")] groups: &[u16],
+        #[cfg(not(any(target_os = "vxworks", target_os = "espidf")))] groups: &[u32],
+        #[cfg(any(target_os = "vxworks", target_os = "espidf"))] groups: &[u16],
     ) -> &mut process::Command {
         self.as_inner_mut().groups(groups);
         self
diff --git a/library/std/src/sys/unix/fd.rs b/library/std/src/sys/unix/fd.rs
index 3de7c68a6866d..fd5580033e4ca 100644
--- a/library/std/src/sys/unix/fd.rs
+++ b/library/std/src/sys/unix/fd.rs
@@ -109,7 +109,7 @@ impl FileDesc {
                 self.as_raw_fd(),
                 buf.as_mut_ptr() as *mut c_void,
                 cmp::min(buf.len(), READ_LIMIT),
-                offset as i64,
+                offset as libc::off64_t,
             ))
             .map(|n| n as usize)
         }
@@ -176,7 +176,7 @@ impl FileDesc {
                 self.as_raw_fd(),
                 buf.as_ptr() as *const c_void,
                 cmp::min(buf.len(), READ_LIMIT),
-                offset as i64,
+                offset as libc::off64_t,
             ))
             .map(|n| n as usize)
         }
diff --git a/library/std/src/sys/unix/fs.rs b/library/std/src/sys/unix/fs.rs
index 7181451de575f..2c3aaa6aa5cfa 100644
--- a/library/std/src/sys/unix/fs.rs
+++ b/library/std/src/sys/unix/fs.rs
@@ -966,7 +966,7 @@ impl File {
             SeekFrom::End(off) => (libc::SEEK_END, off),
             SeekFrom::Current(off) => (libc::SEEK_CUR, off),
         };
-        let n = cvt(unsafe { lseek64(self.as_raw_fd(), pos, whence) })?;
+        let n = cvt(unsafe { lseek64(self.as_raw_fd(), pos as libc::off64_t, whence) })?;
         Ok(n as u64)
     }