diff --git a/tools/niminst/buildsh.tmpl b/tools/niminst/buildsh.tmpl
index faa8a47d087ca..ec20566ac9b75 100644
--- a/tools/niminst/buildsh.tmpl
+++ b/tools/niminst/buildsh.tmpl
@@ -47,7 +47,7 @@ PS4=""
 #  add(result, "# platform detection\n")
 ucpu=`uname -m`
 uos=`uname`
-uosname=`uname -o`
+uosname=
 #  add(result, "# bin dir detection\n")
 binDir=?{firstBinPath(c).toUnix}