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-rw-r--r--nixpkgs/pkgs/development/tools/build-managers/meson/setup-hook.sh4
1 files changed, 2 insertions, 2 deletions
diff --git a/nixpkgs/pkgs/development/tools/build-managers/meson/setup-hook.sh b/nixpkgs/pkgs/development/tools/build-managers/meson/setup-hook.sh
index 6e8d94523e14..8d76ecdaf32b 100644
--- a/nixpkgs/pkgs/development/tools/build-managers/meson/setup-hook.sh
+++ b/nixpkgs/pkgs/development/tools/build-managers/meson/setup-hook.sh
@@ -1,7 +1,7 @@
 mesonConfigurePhase() {
     runHook preConfigure
 
-    if [ -z "$dontAddPrefix" ]; then
+    if [ -z "${dontAddPrefix-}" ]; then
         mesonFlags="--prefix=$prefix $mesonFlags"
     fi
 
@@ -36,7 +36,7 @@ mesonConfigurePhase() {
     runHook postConfigure
 }
 
-if [ -z "$dontUseMesonConfigure" -a -z "$configurePhase" ]; then
+if [ -z "${dontUseMesonConfigure-}" -a -z "${configurePhase-}" ]; then
     setOutputFlags=
     configurePhase=mesonConfigurePhase
 fi