diff --git a/disko b/disko
index ab17146..06e2160 100755
--- a/disko
+++ b/disko
@@ -127,7 +127,7 @@ fi
 echo "disko version $DISKO_VERSION"
 
 nixBuild() {
-  if command -v nom-build > /dev/null; then
+  if command -v nom-build > /dev/null && [ -t 1 ]; then
     nom-build "$@"
   else
     nix-build "$@"
diff --git a/disko-install b/disko-install
index 2c5596e..80715bc 100755
--- a/disko-install
+++ b/disko-install
@@ -164,7 +164,7 @@ cleanupMountPoint() {
 }
 
 nixBuild() {
-  if command -v nom-build > /dev/null; then
+  if command -v nom-build > /dev/null && [ -t 1 ]; then
     nom-build "$@"
   else
     nix-build "$@"