diff --git a/eng/Subsets.props b/eng/Subsets.props
index 73efd1ddb9d1a6..e49f3bbe1d5c67 100644
--- a/eng/Subsets.props
+++ b/eng/Subsets.props
@@ -383,6 +383,8 @@
     The cross tools are used as part of the build process with the downloaded build tools, so we need to build them for the host architecture and build them as unsanitized binaries.
     -->
   <PropertyGroup>
+    <!-- Cross-build only the host cross-components; the target runtime build keeps its own CrossBuild setting. -->
+    <CrossBuildHostTools Condition="'$(CrossBuildHostTools)' == ''">false</CrossBuildHostTools>
     <!-- linux-bionic reports TargetOS as 'linux', so the HostOS/TargetOS check below never fires for it.
          It always targets the bionic libc via the NDK though, so host tools must be built separately. -->
     <_BuildAnyCrossArch Condition="('$(CrossBuild)' == 'true' or '$(BuildArchitecture)' != '$(TargetArchitecture)' or '$(HostOS)' != '$(TargetOS)' or '$(TargetsLinuxBionic)' == 'true' or '$(EnableNativeSanitizers)' != '')">true</_BuildAnyCrossArch>
@@ -414,7 +416,7 @@
                             HostCrossOS=$(HostOS);
                             PgoInstrument=false;
                             NoPgoOptimize=true;
-                            CrossBuild=false;
+                            CrossBuild=$(CrossBuildHostTools);
                             BuildSubdirectory=$(BuildArchitecture);
                             CMakeArgs=$(CMakeArgs) -DCLR_CROSS_COMPONENTS_BUILD=1"
       UndefineProperties="EnableNativeSanitizers"
diff --git a/eng/pipelines/performance/templates/perf-wasm-build-jobs.yml b/eng/pipelines/performance/templates/perf-wasm-build-jobs.yml
index 5e70a42c991ad4..4f6172f74ee171 100644
--- a/eng/pipelines/performance/templates/perf-wasm-build-jobs.yml
+++ b/eng/pipelines/performance/templates/perf-wasm-build-jobs.yml
@@ -31,7 +31,7 @@ jobs:
     platforms:
     - browser_wasm
     jobParameters:
-      buildArgs: -s clr+libs+host+packs -c $(_BuildConfig) /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS) /p:BuildHostTools=true
+      buildArgs: -s clr+libs+host+packs -c $(_BuildConfig) /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS) /p:BuildHostTools=true /p:CrossBuildHostTools=true
       nameSuffix: wasm_coreclr
       isOfficialBuild: false
       postBuildSteps: