diff --git a/build.sh b/build.sh
index 5bca4d7c..db9bac55 100755
--- a/build.sh
+++ b/build.sh
@@ -78,7 +78,7 @@ dependencies() {
                 if [[ $(pip3 show meson; echo $?) == 1 || $(pip3 show mako; echo $?) == 1 ]]; then
                     $SU_CMD pip3 install 'meson>=0.54' mako
                 fi
-                if [[ ! -f /usr/local/bin/glslangValidator ]]; then
+                if ! which glslangValidator >/dev/null; then
                     wget https://github.com/KhronosGroup/glslang/releases/download/SDK-candidate-26-Jul-2020/glslang-master-linux-Release.zip
                     unzip glslang-master-linux-Release.zip bin/glslangValidator
                     $SU_CMD install -m755 bin/glslangValidator /usr/local/bin/