diff --git a/cc.sh b/cc.sh
index 216552710..e7cdfda83 100755
--- a/cc.sh
+++ b/cc.sh
@@ -30,7 +30,9 @@ XBUILD_ARGS+=("/p:Configuration=$BUILD")
 cd "$(dirname "$(readlink -f "$0")")"
 
 if [[ -f "mono_envsetup.sh" ]]; then
+	set +u
 	source "mono_envsetup.sh"
+	set -u
 fi
 
 if [[ -d ".git" ]] && hash git &>/dev/null; then
diff --git a/run.sh b/run.sh
index a7cfb061a..def3102f8 100755
--- a/run.sh
+++ b/run.sh
@@ -32,7 +32,9 @@ fi
 cd "$(dirname "$(readlink -f "$0")")"
 
 if [[ -f "mono_envsetup.sh" ]]; then
+	set +u
 	source "mono_envsetup.sh"
+	set -u
 fi
 
 BINARY="ArchiSteamFarm/bin/$BUILD/ArchiSteamFarm.exe"