diff --git a/eng/pipelines/extra-platforms/runtime-extra-platforms-wasm.yml b/eng/pipelines/extra-platforms/runtime-extra-platforms-wasm.yml
index 12981837609c3..7e68d3a46576f 100644
--- a/eng/pipelines/extra-platforms/runtime-extra-platforms-wasm.yml
+++ b/eng/pipelines/extra-platforms/runtime-extra-platforms-wasm.yml
@@ -143,7 +143,7 @@ jobs:
       platforms:
         - browser_wasm
       nameSuffix: _EAT
-      extraBuildArgs: /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS)
+      extraBuildArgs: /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS) /maxcpucount:1
       runAOT: false
       isExtraPlatformsBuild: ${{ parameters.isExtraPlatformsBuild }}
       isWasmOnlyBuild: ${{ parameters.isWasmOnlyBuild }}
diff --git a/eng/pipelines/runtime.yml b/eng/pipelines/runtime.yml
index b8940dacd30f2..8ad2dd191483c 100644
--- a/eng/pipelines/runtime.yml
+++ b/eng/pipelines/runtime.yml
@@ -530,7 +530,7 @@ extends:
           runAOT: false
           shouldRunSmokeOnly: false
           alwaysRun: ${{ variables.isRollingBuild }}
-          extraBuildArgs: /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS)
+          extraBuildArgs: /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS) /maxcpucount:2
 
       # AOT Library tests
       - template: /eng/pipelines/common/templates/wasm-library-aot-tests.yml