diff --git a/windows-1809/cuda-devel/Dockerfile b/windows-1809/cuda-devel/Dockerfile
index 3ed1074a4a82cfcccda633df523b99d368015e53..320b679f57b2d263802f242f4a5e8676ca460d41 100644
--- a/windows-1809/cuda-devel/Dockerfile
+++ b/windows-1809/cuda-devel/Dockerfile
@@ -39,7 +39,7 @@ RUN cd $env:VCPKG_DIR; \
         "\"opencv4[cuda,ffmpeg,ximea,opengl,contrib,ipp,dnn]\"" \
         "\"mxnet[cpp,opencv,cuda,cudnn]\""; \
     [Environment]::SetEnvironmentVariable('VCPKG_TRIPLET', "\"$vcpkg_triplet\"", [EnvironmentVariableTarget]::Machine); \
-    [Environment]::SetEnvironmentVariable('CMAKE_TOOLCHAIN_FILE', "\"/vcpkg/scripts/buildsystems/vcpkg.cmake\"", [EnvironmentVariableTarget]::Machine); \
+    [Environment]::SetEnvironmentVariable('CMAKE_TOOLCHAIN_FILE', "\"$env:VCPKG_DIR/scripts/buildsystems/vcpkg.cmake\"", [EnvironmentVariableTarget]::Machine); \
     [Environment]::SetEnvironmentVariable('VCPKG_TARGET_TRIPLET', "\"$vcpkg_triplet\"", [EnvironmentVariableTarget]::Machine); \
     [Environment]::SetEnvironmentVariable('VCPKG_INSTALL_DIR', "\"$env:VCPKG_DIR/installed/$vcpkg_triplet\"", [EnvironmentVariableTarget]::Machine); \
     Remove-Item -Force -Recurse ./downloads; \
diff --git a/windows-1809/devel/Dockerfile b/windows-1809/devel/Dockerfile
index 075b2eeadeedd6f88fb1a2d12f41454c003de281..f3d55a222027f1654ff08ce13a6955647c9c92c9 100644
--- a/windows-1809/devel/Dockerfile
+++ b/windows-1809/devel/Dockerfile
@@ -28,7 +28,7 @@ RUN cd $env:VCPKG_DIR; \
         "\"opencv4[ffmpeg,ximea,opengl,contrib,ipp,dnn]\"" \
         "\"mxnet[cpp,opencv]\""; \
     [Environment]::SetEnvironmentVariable('VCPKG_TRIPLET', "\"$vcpkg_triplet\"", [EnvironmentVariableTarget]::Machine); \
-    [Environment]::SetEnvironmentVariable('CMAKE_TOOLCHAIN_FILE', "\"/vcpkg/scripts/buildsystems/vcpkg.cmake\"", [EnvironmentVariableTarget]::Machine); \
+    [Environment]::SetEnvironmentVariable('CMAKE_TOOLCHAIN_FILE', "\"$env:VCPKG_DIR/scripts/buildsystems/vcpkg.cmake\"", [EnvironmentVariableTarget]::Machine); \
     [Environment]::SetEnvironmentVariable('VCPKG_TARGET_TRIPLET', "\"$vcpkg_triplet\"", [EnvironmentVariableTarget]::Machine); \
     [Environment]::SetEnvironmentVariable('VCPKG_INSTALL_DIR', "\"$env:VCPKG_DIR/installed/$vcpkg_triplet\"", [EnvironmentVariableTarget]::Machine); \
     Remove-Item -Force -Recurse ./downloads; \