diff --git a/install.sh b/install.sh
index c441b6f4..b499d94c 100755
--- a/install.sh
+++ b/install.sh
@@ -51,7 +51,7 @@ function python_finder {
 }
 
 function num_cores {
-  if ! command_exists nproc; then
+  if command_exists nproc; then
    num_cpus=$(nproc)
   else
     num_cpus=1