diff --git a/config.nims b/config.nims
index 7a47a3db..fdbedb2b 100644
--- a/config.nims
+++ b/config.nims
@@ -5,6 +5,7 @@ warning("ProveInit", off)
 warning("Uninit", off)
 switch("experimental", "strictDefs")
 switch("experimental", "strictFuncs")
+switch("define", "nimPreviewSlimSystem")
 switch("define", "nimStrictDelete")
 switch("mm", "refc")
 
diff --git a/src/cli.nim b/src/cli.nim
index c6859051..95fef14e 100644
--- a/src/cli.nim
+++ b/src/cli.nim
@@ -1,4 +1,4 @@
-import std/[os, parseutils, strformat, strutils, terminal]
+import std/[os, parseutils, strformat, strutils, syncio, terminal]
 import pkg/supersnappy
 import patched_libs/parseopt3
 
diff --git a/src/completion/completion.nim b/src/completion/completion.nim
index a322786e..2174f9c5 100644
--- a/src/completion/completion.nim
+++ b/src/completion/completion.nim
@@ -1,4 +1,4 @@
-import std/[os, strformat]
+import std/[os, strformat, syncio]
 import pkg/supersnappy
 import ../cli