diff --git a/nimbus/rpc/p2p.nim b/nimbus/rpc/p2p.nim
index 58a2ff89c..ae856fc82 100644
--- a/nimbus/rpc/p2p.nim
+++ b/nimbus/rpc/p2p.nim
@@ -247,7 +247,7 @@ proc setupEthRpc*(node: EthereumNode, chain: BaseChainDB, rpcsrv: RpcServer) =
     let
       source = send.source.toAddress
       destination = send.to.toAddress
-      data = send.data.string.fromHex
+      data = nimcrypto.utils.fromHex(send.data.string)
       contractCreation = false  # TODO: Check if has code
       v = 0.byte # TODO
       r = 0.u256
@@ -322,7 +322,7 @@ proc setupEthRpc*(node: EthereumNode, chain: BaseChainDB, rpcsrv: RpcServer) =
       # if no wallets, remains as ZERO_ADDRESS
       # TODO: Wallets
       destination = if call.to.isSome: call.to.get.toAddress else: ZERO_ADDRESS
-      data = if call.data.isSome: call.data.get.string.fromHex else: @[]
+      data = if call.data.isSome: nimcrypto.utils.fromHex(call.data.get.string) else: @[]
       value = if call.value.isSome: call.value.get else: 0.u256
       comp = setupComputation(vmState, header.blockNumber, value, data, sender, destination, gasLimit, gasPrice, call.to.isNone)
 
diff --git a/nimbus/vm/interpreter/gas_costs.nim b/nimbus/vm/interpreter/gas_costs.nim
index 400b0f886..90de3b2bf 100644
--- a/nimbus/vm/interpreter/gas_costs.nim
+++ b/nimbus/vm/interpreter/gas_costs.nim
@@ -358,7 +358,7 @@ template gasCosts(fork: Fork, prefix, ResultGasCostsName: untyped) =
   # ###################################################################################################
 
   # TODO - change this `let` into `const` - pending: https://github.com/nim-lang/Nim/issues/8015
-  let `ResultGasCostsName`*{.inject.}: GasCosts = block:
+  let `ResultGasCostsName`*{.inject, compileTime.}: GasCosts = block:
     # We use a block expression to avoid name redefinition conflicts
     # with "fixed" and "dynamic"
 
diff --git a/nimbus/vm/precompiles.nim b/nimbus/vm/precompiles.nim
index 5234087d8..90ab55243 100644
--- a/nimbus/vm/precompiles.nim
+++ b/nimbus/vm/precompiles.nim
@@ -179,8 +179,8 @@ proc modExpInternal(computation: BaseComputation, base_len, exp_len, mod_len: in
     #       we should return a 256-bit big-endian byte array
 
     # Force static evaluation
-    func zero(): static array[T.bits div 8, byte] = discard
-    func one(): static array[T.bits div 8, byte] =
+    func zero(): array[T.bits div 8, byte] {.compileTime.} = discard
+    func one(): array[T.bits div 8, byte] {.compileTime.} =
       when cpuEndian == bigEndian:
         result[0] = 1
       else: