diff --git a/build/azure-pipelines/darwin/continuous-build-darwin.yml b/build/azure-pipelines/darwin/continuous-build-darwin.yml
index 86cf6e4411e..018b09c48ce 100644
--- a/build/azure-pipelines/darwin/continuous-build-darwin.yml
+++ b/build/azure-pipelines/darwin/continuous-build-darwin.yml
@@ -11,7 +11,7 @@ steps:
   inputs:
     versionSpec: "1.x"
 - script: |
-    yarn --frozen-lockfile
+    CHILD_CONCURRENCY=1 yarn --frozen-lockfile
   displayName: Install Dependencies
   condition: and(succeeded(), ne(variables['CacheRestored'], 'true'))
 - task: 1ESLighthouseEng.PipelineArtifactCaching.SaveCacheV1.SaveCache@1
diff --git a/build/azure-pipelines/linux/continuous-build-linux.yml b/build/azure-pipelines/linux/continuous-build-linux.yml
index 7e62edbe87d..7ca5db331a2 100644
--- a/build/azure-pipelines/linux/continuous-build-linux.yml
+++ b/build/azure-pipelines/linux/continuous-build-linux.yml
@@ -19,7 +19,7 @@ steps:
   inputs:
     versionSpec: "1.x"
 - script: |
-    yarn --frozen-lockfile
+    CHILD_CONCURRENCY=1 yarn --frozen-lockfile
   displayName: Install Dependencies
   condition: and(succeeded(), ne(variables['CacheRestored'], 'true'))
 - task: 1ESLighthouseEng.PipelineArtifactCaching.SaveCacheV1.SaveCache@1
diff --git a/build/azure-pipelines/win32/continuous-build-win32.yml b/build/azure-pipelines/win32/continuous-build-win32.yml
index dc102a4656f..f0316915b25 100644
--- a/build/azure-pipelines/win32/continuous-build-win32.yml
+++ b/build/azure-pipelines/win32/continuous-build-win32.yml
@@ -16,6 +16,8 @@ steps:
     vstsFeed: '$(ArtifactFeed)'
 - powershell: |
     yarn --frozen-lockfile
+  env:
+    CHILD_CONCURRENCY: "1"
   displayName: Install Dependencies
   condition: and(succeeded(), ne(variables['CacheRestored'], 'true'))
 - task: 1ESLighthouseEng.PipelineArtifactCaching.SaveCacheV1.SaveCache@1