diff --git a/programs/bpf/rust/clock/src/lib.rs b/programs/bpf/rust/clock/src/lib.rs
index 5b7d373d5c..e6bda0d94b 100644
--- a/programs/bpf/rust/clock/src/lib.rs
+++ b/programs/bpf/rust/clock/src/lib.rs
@@ -8,7 +8,7 @@ use solana_sdk::{
 
 entrypoint!(process_instruction);
 fn process_instruction(_program_id: &Pubkey, accounts: &mut [AccountInfo], _data: &[u8]) -> u32 {
-    match Clock::from(&accounts[2]) {
+    match Clock::from_account_info(&accounts[2]) {
         Some(clock) => {
             info!("slot, segment, epoch, stakers_epoch");
             info!(
diff --git a/programs/stake_api/src/stake_instruction.rs b/programs/stake_api/src/stake_instruction.rs
index bc9552b21e..9da10981f5 100644
--- a/programs/stake_api/src/stake_instruction.rs
+++ b/programs/stake_api/src/stake_instruction.rs
@@ -179,7 +179,7 @@ pub fn process_instruction(
             me.delegate_stake(
                 vote,
                 stake,
-                &sysvar::clock_account::from_keyed_account(&rest[1])?,
+                &sysvar::clock::from_keyed_account(&rest[1])?,
                 &config::from_keyed_account(&rest[2])?,
             )
         }
@@ -209,7 +209,7 @@ pub fn process_instruction(
             me.withdraw(
                 lamports,
                 &mut to,
-                &sysvar::clock_account::from_keyed_account(&sysvar[0])?,
+                &sysvar::clock::from_keyed_account(&sysvar[0])?,
                 &sysvar::stake_history::from_keyed_account(&sysvar[1])?,
             )
         }
@@ -221,7 +221,7 @@ pub fn process_instruction(
             let vote = &mut vote[0];
             let clock = &rest[0];
 
-            me.deactivate_stake(vote, &sysvar::clock_account::from_keyed_account(&clock)?)
+            me.deactivate_stake(vote, &sysvar::clock::from_keyed_account(&clock)?)
         }
     }
 }
@@ -238,7 +238,7 @@ mod tests {
             .iter()
             .map(|meta| {
                 if sysvar::clock::check_id(&meta.pubkey) {
-                    sysvar::clock_account::new(1, 0, 0, 0, 0)
+                    sysvar::clock::new_account(1, 0, 0, 0, 0)
                 } else if sysvar::rewards::check_id(&meta.pubkey) {
                     sysvar::rewards::create_account(1, 0.0, 0.0)
                 } else if sysvar::stake_history::check_id(&meta.pubkey) {
@@ -336,7 +336,7 @@ mod tests {
                     KeyedAccount::new(
                         &sysvar::clock::id(),
                         false,
-                        &mut sysvar::clock_account::new(1, 0, 0, 0, 0)
+                        &mut sysvar::clock::new_account(1, 0, 0, 0, 0)
                     ),
                     KeyedAccount::new(
                         &config::id(),
diff --git a/programs/storage_api/src/storage_processor.rs b/programs/storage_api/src/storage_processor.rs
index 55976469e4..2c4c46f4e8 100644
--- a/programs/storage_api/src/storage_processor.rs
+++ b/programs/storage_api/src/storage_processor.rs
@@ -42,7 +42,7 @@ pub fn process_instruction(
                 // This instruction must be signed by `me`
                 Err(InstructionError::InvalidArgument)?;
             }
-            let clock = sysvar::clock_account::from_keyed_account(&rest[0])?;
+            let clock = sysvar::clock::from_keyed_account(&rest[0])?;
             storage_account.submit_mining_proof(
                 sha_state,
                 segment_index,
@@ -56,7 +56,7 @@ pub fn process_instruction(
                 // This instruction must be signed by `me`
                 Err(InstructionError::InvalidArgument)?;
             }
-            let clock = sysvar::clock_account::from_keyed_account(&rest[0])?;
+            let clock = sysvar::clock::from_keyed_account(&rest[0])?;
             storage_account.advertise_storage_recent_blockhash(hash, segment, clock)
         }
         StorageInstruction::ClaimStorageReward => {
@@ -68,7 +68,7 @@ pub fn process_instruction(
             let (rewards_pools, owner) = rest.split_at_mut(1);
 
             let rewards = sysvar::rewards::from_keyed_account(&rewards[0])?;
-            let clock = sysvar::clock_account::from_keyed_account(&clock[0])?;
+            let clock = sysvar::clock::from_keyed_account(&clock[0])?;
             let mut owner = StorageAccount::new(*owner[0].unsigned_key(), &mut owner[0].account);
 
             storage_account.claim_storage_reward(&mut rewards_pools[0], clock, rewards, &mut owner)
@@ -84,7 +84,7 @@ pub fn process_instruction(
                 Err(InstructionError::InvalidArgument)?;
             }
             let me_id = storage_account.id;
-            let clock = sysvar::clock_account::from_keyed_account(&clock[0])?;
+            let clock = sysvar::clock::from_keyed_account(&clock[0])?;
             let mut rest: Vec<_> = rest
                 .iter_mut()
                 .map(|keyed_account| {
diff --git a/programs/storage_program/tests/storage_processor.rs b/programs/storage_program/tests/storage_processor.rs
index ec7b63e641..107dc228cf 100644
--- a/programs/storage_program/tests/storage_processor.rs
+++ b/programs/storage_program/tests/storage_processor.rs
@@ -15,8 +15,7 @@ use solana_sdk::pubkey::Pubkey;
 use solana_sdk::signature::{Keypair, KeypairUtil, Signature};
 use solana_sdk::system_instruction;
 use solana_sdk::sysvar::clock::{self, Clock};
-use solana_sdk::sysvar::rewards::Rewards;
-use solana_sdk::sysvar::{clock_account, rewards};
+use solana_sdk::sysvar::rewards::{self, Rewards};
 use solana_storage_api::id;
 use solana_storage_api::storage_contract::StorageAccount;
 use solana_storage_api::storage_contract::{ProofStatus, StorageContract, STORAGE_ACCOUNT_SPACE};
@@ -124,8 +123,8 @@ fn test_proof_bounds() {
         Hash::default(),
     );
     // the proof is for segment 0, need to move the slot into segment 2
-    let mut clock_account = clock_account::new(1, 0, 0, 0, 0);
-    Clock::to(
+    let mut clock_account = clock::new_account(1, 0, 0, 0, 0);
+    Clock::to_account(
         &Clock {
             slot: DEFAULT_SLOTS_PER_SEGMENT * 2,
             segment: 2,
@@ -152,7 +151,7 @@ fn test_serialize_overflow() {
     let clock_id = clock::id();
     let mut keyed_accounts = Vec::new();
     let mut user_account = Account::default();
-    let mut clock_account = clock_account::new(1, 0, 0, 0, 0);
+    let mut clock_account = clock::new_account(1, 0, 0, 0, 0);
     keyed_accounts.push(KeyedAccount::new(&pubkey, true, &mut user_account));
     keyed_accounts.push(KeyedAccount::new(&clock_id, false, &mut clock_account));
 
@@ -177,8 +176,8 @@ fn test_invalid_accounts_len() {
         Hash::default(),
     );
     // move tick height into segment 1
-    let mut clock_account = clock_account::new(1, 0, 0, 0, 0);
-    Clock::to(
+    let mut clock_account = clock::new_account(1, 0, 0, 0, 0);
+    Clock::to_account(
         &Clock {
             slot: 16,
             segment: 1,
@@ -237,8 +236,8 @@ fn test_submit_mining_ok() {
         Hash::default(),
     );
     // move slot into segment 1
-    let mut clock_account = clock_account::new(1, 0, 0, 0, 0);
-    Clock::to(
+    let mut clock_account = clock::new_account(1, 0, 0, 0, 0);
+    Clock::to_account(
         &Clock {
             slot: DEFAULT_SLOTS_PER_SEGMENT,
             segment: 1,
diff --git a/programs/vote_api/src/vote_instruction.rs b/programs/vote_api/src/vote_instruction.rs
index a0524f9575..269e0f4155 100644
--- a/programs/vote_api/src/vote_instruction.rs
+++ b/programs/vote_api/src/vote_instruction.rs
@@ -154,7 +154,7 @@ pub fn process_instruction(
             vote_state::process_vote(
                 me,
                 &sysvar::slot_hashes::from_keyed_account(&slot_hashes_and_clock[0])?,
-                &sysvar::clock_account::from_keyed_account(&slot_hashes_and_clock[1])?,
+                &sysvar::clock::from_keyed_account(&slot_hashes_and_clock[1])?,
                 other_signers,
                 &vote,
             )
@@ -188,7 +188,7 @@ mod tests {
             .iter()
             .map(|meta| {
                 if sysvar::clock::check_id(&meta.pubkey) {
-                    sysvar::clock_account::new(1, 0, 0, 0, 0)
+                    sysvar::clock::new_account(1, 0, 0, 0, 0)
                 } else if sysvar::slot_hashes::check_id(&meta.pubkey) {
                     sysvar::slot_hashes::create_account(1, &[])
                 } else {
diff --git a/runtime/src/bank.rs b/runtime/src/bank.rs
index cc238c4b80..4a187a7474 100644
--- a/runtime/src/bank.rs
+++ b/runtime/src/bank.rs
@@ -41,7 +41,7 @@ use solana_sdk::{
     signature::{Keypair, Signature},
     system_transaction,
     sysvar::{
-        clock, clock_account, fees, rewards,
+        clock, fees, rewards,
         slot_hashes::{self, SlotHashes},
         stake_history,
     },
@@ -400,7 +400,7 @@ impl Bank {
     fn update_clock(&self) {
         self.store_account(
             &clock::id(),
-            &clock_account::new(
+            &clock::new_account(
                 1,
                 self.slot,
                 get_segment_from_slot(self.slot, self.slots_per_segment),
diff --git a/sdk/Cargo.toml b/sdk/Cargo.toml
index e8d8fda94b..2958f96ad7 100644
--- a/sdk/Cargo.toml
+++ b/sdk/Cargo.toml
@@ -11,17 +11,12 @@ edition = "2018"
 [features]
 # On-chain program specific dependencies
 program = []
-# Kitchen sink specific dependencies
-kitchen_sink = [
+# Dependencies that are not compatible or needed for on-chain programs
+default = [
     "assert_matches",
     "byteorder",
     "chrono",
-    "generic-array",
-    "itertools",
-    "log",
     "memmap",
-    "num-derive",
-    "num-traits",
     "rand",
     "rayon",
     "serde_json",
@@ -29,7 +24,6 @@ kitchen_sink = [
     "solana-logger",
     "untrusted",
 ]
-default = ["kitchen_sink"]
 
 [dependencies]
 assert_matches = { version = "1.3.0", optional = true }
@@ -37,13 +31,13 @@ bincode = "1.1.4"
 bs58 = "0.2.5"
 byteorder = { version = "1.3.2", optional = true }
 chrono = { version = "0.4.9", features = ["serde"], optional = true }
-generic-array = { version = "0.13.2", default-features = false, features = ["serde", "more_lengths"], optional = true }
+generic-array = { version = "0.13.2", default-features = false, features = ["serde", "more_lengths"] }
 hex = "0.3.2"
-itertools = { version = "0.8.0", optional = true }
-log = { version = "0.4.8", optional = true }
+itertools = { version = "0.8.0" }
+log = { version = "0.4.8" }
 memmap = { version = "0.6.2", optional = true }
-num-derive = { version = "0.2", optional = true }
-num-traits = { version = "0.2", optional = true }
+num-derive = { version = "0.2" }
+num-traits = { version = "0.2" }
 rand = { version = "0.6.5", optional = true }
 rayon = { version = "1.2.0", optional = true }
 serde = "1.0.99"
diff --git a/sdk/src/lib.rs b/sdk/src/lib.rs
index b09d43142d..dfa03c4815 100644
--- a/sdk/src/lib.rs
+++ b/sdk/src/lib.rs
@@ -1,67 +1,44 @@
+pub mod account;
+pub mod account_utils;
+pub mod bpf_loader;
 pub mod clock;
+pub mod fee_calculator;
+pub mod hash;
+pub mod inflation;
+pub mod instruction;
+pub mod instruction_processor_utils;
+pub mod loader_instruction;
+pub mod message;
+pub mod native_loader;
+pub mod packet;
+pub mod poh_config;
 pub mod pubkey;
+pub mod rent;
+pub mod rpc_port;
+pub mod short_vec;
+pub mod system_instruction;
+pub mod system_program;
 pub mod sysvar;
+pub mod timing;
 
-// On-chain program modules
-#[cfg(feature = "program")]
+// On-chain program specific modules
 pub mod account_info;
-#[cfg(feature = "program")]
 pub mod entrypoint;
-#[cfg(feature = "program")]
 pub mod log;
-#[cfg(feature = "program")]
 pub mod program_test;
 
-// Kitchen sink modules
-#[cfg(feature = "kitchen_sink")]
-pub mod account;
-#[cfg(feature = "kitchen_sink")]
-pub mod account_utils;
-#[cfg(feature = "kitchen_sink")]
-pub mod bpf_loader;
-#[cfg(feature = "kitchen_sink")]
+// Modules not usable by on-chain programs
+#[cfg(not(feature = "program"))]
 pub mod client;
-#[cfg(feature = "kitchen_sink")]
-pub mod fee_calculator;
-#[cfg(feature = "kitchen_sink")]
+#[cfg(not(feature = "program"))]
 pub mod genesis_block;
-#[cfg(feature = "kitchen_sink")]
-pub mod hash;
-#[cfg(feature = "kitchen_sink")]
-pub mod inflation;
-#[cfg(feature = "kitchen_sink")]
-pub mod instruction;
-#[cfg(feature = "kitchen_sink")]
-pub mod instruction_processor_utils;
-#[cfg(feature = "kitchen_sink")]
-pub mod loader_instruction;
-#[cfg(feature = "kitchen_sink")]
-pub mod message;
-#[cfg(feature = "kitchen_sink")]
-pub mod native_loader;
-#[cfg(feature = "kitchen_sink")]
-pub mod packet;
-#[cfg(feature = "kitchen_sink")]
-pub mod poh_config;
-#[cfg(feature = "kitchen_sink")]
-pub mod rent;
-#[cfg(feature = "kitchen_sink")]
-pub mod rpc_port;
-#[cfg(feature = "kitchen_sink")]
-pub mod short_vec;
-#[cfg(feature = "kitchen_sink")]
+#[cfg(not(feature = "program"))]
 pub mod signature;
-#[cfg(feature = "kitchen_sink")]
-pub mod system_instruction;
-#[cfg(feature = "kitchen_sink")]
-pub mod system_program;
-#[cfg(feature = "kitchen_sink")]
+#[cfg(not(feature = "program"))]
 pub mod system_transaction;
-#[cfg(feature = "kitchen_sink")]
-pub mod timing;
-#[cfg(feature = "kitchen_sink")]
+#[cfg(not(feature = "program"))]
 pub mod transaction;
-#[cfg(feature = "kitchen_sink")]
+#[cfg(not(feature = "program"))]
 pub mod transport;
 
 #[macro_use]
diff --git a/sdk/src/pubkey.rs b/sdk/src/pubkey.rs
index 2954c70f7c..18e7995dc1 100644
--- a/sdk/src/pubkey.rs
+++ b/sdk/src/pubkey.rs
@@ -52,7 +52,6 @@ impl Pubkey {
         Self::new(&rand::random::<[u8; 32]>())
     }
 
-    #[cfg(feature = "program")]
     pub fn log(&self) {
         use crate::log::sol_log_64;
         for (i, k) in self.0.iter().enumerate() {
diff --git a/sdk/src/sysvar/clock.rs b/sdk/src/sysvar/clock.rs
index a735cd2c06..a48b20e75f 100644
--- a/sdk/src/sysvar/clock.rs
+++ b/sdk/src/sysvar/clock.rs
@@ -1,7 +1,11 @@
 //! This account contains the clock slot, epoch, and stakers_epoch
 //!
 
-pub use crate::clock::{Epoch, Segment, Slot};
+use crate::account::Account;
+use crate::account_info::AccountInfo;
+use crate::clock::{Epoch, Segment, Slot};
+use crate::sysvar;
+use bincode::serialized_size;
 
 const ID: [u8; 32] = [
     6, 167, 213, 23, 24, 199, 116, 201, 40, 86, 99, 152, 105, 29, 94, 182, 139, 94, 184, 163, 155,
@@ -18,3 +22,63 @@ pub struct Clock {
     pub epoch: Epoch,
     pub stakers_epoch: Epoch,
 }
+
+impl Clock {
+    pub fn size_of() -> usize {
+        serialized_size(&Self::default()).unwrap() as usize
+    }
+    pub fn from_account(account: &Account) -> Option<Self> {
+        account.deserialize_data().ok()
+    }
+    pub fn to_account(&self, account: &mut Account) -> Option<()> {
+        account.serialize_data(self).ok()
+    }
+    pub fn from_account_info(account: &AccountInfo) -> Option<Self> {
+        account.deserialize_data().ok()
+    }
+    pub fn to_account_info(&self, account: &mut AccountInfo) -> Option<()> {
+        account.serialize_data(self).ok()
+    }
+}
+
+pub fn new_account(
+    lamports: u64,
+    slot: Slot,
+    segment: Segment,
+    epoch: Epoch,
+    stakers_epoch: Epoch,
+) -> Account {
+    Account::new_data(
+        lamports,
+        &Clock {
+            slot,
+            segment,
+            epoch,
+            stakers_epoch,
+        },
+        &sysvar::id(),
+    )
+    .unwrap()
+}
+
+use crate::account::KeyedAccount;
+use crate::instruction::InstructionError;
+
+pub fn from_keyed_account(account: &KeyedAccount) -> Result<Clock, InstructionError> {
+    if !check_id(account.unsigned_key()) {
+        return Err(InstructionError::InvalidArgument);
+    }
+    Clock::from_account(account.account).ok_or(InstructionError::InvalidArgument)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_new() {
+        let account = new_account(1, 0, 0, 0, 0);
+        let clock = Clock::from_account(&account).unwrap();
+        assert_eq!(clock, Clock::default());
+    }
+}
diff --git a/sdk/src/sysvar/clock_account.rs b/sdk/src/sysvar/clock_account.rs
deleted file mode 100644
index 1c0710a9ab..0000000000
--- a/sdk/src/sysvar/clock_account.rs
+++ /dev/null
@@ -1,64 +0,0 @@
-//! Serialize clock support for Account
-//!
-use crate::account::Account;
-use crate::sysvar;
-use crate::sysvar::clock::{check_id, Clock};
-use bincode::serialized_size;
-
-pub use crate::clock::{Epoch, Slot};
-
-impl Clock {
-    pub fn from(account: &Account) -> Option<Self> {
-        account.deserialize_data().ok()
-    }
-    pub fn to(&self, account: &mut Account) -> Option<()> {
-        account.serialize_data(self).ok()
-    }
-
-    pub fn size_of() -> usize {
-        serialized_size(&Self::default()).unwrap() as usize
-    }
-}
-
-pub fn new(
-    lamports: u64,
-    slot: Slot,
-    segment: Segment,
-    epoch: Epoch,
-    stakers_epoch: Epoch,
-) -> Account {
-    Account::new_data(
-        lamports,
-        &Clock {
-            slot,
-            segment,
-            epoch,
-            stakers_epoch,
-        },
-        &sysvar::id(),
-    )
-    .unwrap()
-}
-
-use crate::account::KeyedAccount;
-use crate::clock::Segment;
-use crate::instruction::InstructionError;
-
-pub fn from_keyed_account(account: &KeyedAccount) -> Result<Clock, InstructionError> {
-    if !check_id(account.unsigned_key()) {
-        return Err(InstructionError::InvalidArgument);
-    }
-    Clock::from(account.account).ok_or(InstructionError::InvalidArgument)
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_create_account() {
-        let account = new(1, 0, 0, 0, 0);
-        let clock = Clock::from(&account).unwrap();
-        assert_eq!(clock, Clock::default());
-    }
-}
diff --git a/sdk/src/sysvar/clock_account_info.rs b/sdk/src/sysvar/clock_account_info.rs
deleted file mode 100644
index cbec33ff0d..0000000000
--- a/sdk/src/sysvar/clock_account_info.rs
+++ /dev/null
@@ -1,18 +0,0 @@
-//! Serialize clock support for AccountInfo
-//!
-use crate::account_info::AccountInfo;
-use crate::sysvar::clock::Clock;
-use bincode::serialized_size;
-
-impl Clock {
-    pub fn from(account: &AccountInfo) -> Option<Self> {
-        account.deserialize_data().ok()
-    }
-    pub fn to(&self, account: &mut AccountInfo) -> Option<()> {
-        account.serialize_data(self).ok()
-    }
-
-    pub fn size_of() -> usize {
-        serialized_size(&Self::default()).unwrap() as usize
-    }
-}
diff --git a/sdk/src/sysvar/mod.rs b/sdk/src/sysvar/mod.rs
index ba581acbe0..4a955e1161 100644
--- a/sdk/src/sysvar/mod.rs
+++ b/sdk/src/sysvar/mod.rs
@@ -1,25 +1,13 @@
 //! named accounts for synthesized data accounts for bank state, etc.
 //!
-#[cfg(feature = "kitchen_sink")]
 use crate::pubkey::Pubkey;
 
 pub mod clock;
-
-#[cfg(feature = "program")]
-pub mod clock_account_info;
-
-#[cfg(feature = "kitchen_sink")]
-pub mod clock_account;
-#[cfg(feature = "kitchen_sink")]
 pub mod fees;
-#[cfg(feature = "kitchen_sink")]
 pub mod rewards;
-#[cfg(feature = "kitchen_sink")]
 pub mod slot_hashes;
-#[cfg(feature = "kitchen_sink")]
 pub mod stake_history;
 
-#[cfg(feature = "kitchen_sink")]
 pub fn is_sysvar_id(id: &Pubkey) -> bool {
     clock::check_id(id) || fees::check_id(id) || rewards::check_id(id) || slot_hashes::check_id(id)
 }