diff --git a/.appveyor.yml b/.appveyor.yml
index a4ceb59ef..c7fbdcf8b 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -39,7 +39,7 @@ for:
     - export PATH="$PATH:~/.jabba/jdk/adopt@1.8.0-222/bin"
     - export PATH="$PATH:graalvm-ce-java8-20.1.0/bin"
     - gu install native-image
-    - sbt -Dsbt.native-image=$(pwd)/graalvm-ce-java8-20.1.0/bin/native-image "sbtClientProj/buildNativeThinClient"
+    - sbt "-Dsbt.io.virtual=false" "-Dsbt.native-image=$(pwd)/graalvm-ce-java8-20.1.0/bin/native-image" "sbtClientProj/buildNativeThinClient"
 
 -
   matrix:
@@ -70,7 +70,7 @@ for:
     - export PATH="$PATH:~/.jabba/jdk/adopt@1.8.0-222/Contents/Home/bin"
     - export PATH="$PATH:graalvm-ce-java8-20.1.0/Contents/Home/bin"
     - gu install native-image
-    - sbt -Dsbt.native-image=$(pwd)/graalvm-ce-java8-20.1.0/Contents/Home/bin/native-image "sbtClientProj/buildNativeThinClient"
+    - sbt "-Dsbt.io.virtual=false" "-Dsbt.native-image=$(pwd)/graalvm-ce-java8-20.1.0/Contents/Home/bin/native-image" "sbtClientProj/buildNativeThinClient"
 
 -
   matrix:
@@ -123,7 +123,7 @@ for:
     - '%USERPROFILE%\.sbt'
 
   test_script:
-    - sbt "-Dsbt.native-image=C:\graalvm-ce-java8-20.1.0\bin\native-image.cmd" "sbtClientProj/buildNativeThinClient"
+    - sbt "-Dsbt.io.virtual=false" "-Dsbt.native-image=C:\graalvm-ce-java8-20.1.0\bin\native-image.cmd" "sbtClientProj/buildNativeThinClient"
 -
   matrix:
     only:
@@ -157,4 +157,4 @@ for:
   test_script:
     # The server tests often fail in CI when run together so just run a single test to ensure
     # that the thin client works on windows
-    - sbt "scripted actions/* classloader-cache/* nio/* watch/*" "serverTestProj/testOnly testpkg.ClientTest"
+    - sbt "-Dsbt.io.virtual=false" "scripted actions/* classloader-cache/* nio/* watch/*" "serverTestProj/testOnly testpkg.ClientTest"
diff --git a/.travis.yml b/.travis.yml
index bbbba1e75..f3036cf9b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -34,7 +34,7 @@ install:
 
 script:
   # It doesn't need that much memory because compile and run are forked
-  - sbt -Dsbt.ci=true -J-XX:ReservedCodeCacheSize=128m -J-Xmx800M -J-Xms800M -J-server "$SBT_CMD"
+  - sbt -Dsbt.io.virtual=false -Dsbt.ci=true -J-XX:ReservedCodeCacheSize=128m -J-Xmx800M -J-Xms800M -J-server "$SBT_CMD"
 
 before_cache:
   - find $HOME/.cache/coursier/v1 -name "ivydata-*.properties" -delete