1 files changed, 4 insertions, 4 deletions
diff --git a/share/qbs/modules/Exporter/pkgconfig/pkgconfig.js b/share/qbs/modules/Exporter/pkgconfig/pkgconfig.js
index a3109d61d..52b4dffe3 100644
--- a/share/qbs/modules/Exporter/pkgconfig/pkgconfig.js
+++ b/share/qbs/modules/Exporter/pkgconfig/pkgconfig.js
@@ -44,9 +44,9 @@ function writeEntry(product, file, key, propertyName, required, additionalValues
     var value = product.Exporter.pkgconfig[propertyName];
     if (additionalValues && additionalValues.length > 0)
         value = (value || []).concat(additionalValues);
-    var valueIsNotEmpty = value && (!Array.isArray(value) || value.length > 0);
+    var valueIsNotEmpty = value && (!(value instanceof Array) || value.length > 0);
     if (valueIsNotEmpty) {
-        if (Array.isArray(value))
+        if (value instanceof Array)
             value = value.join(' ');
         file.writeLine(key + ": " + value);
     } else if (required) {
@@ -83,7 +83,7 @@ function collectAutodetectedData(topLevelProduct)
                 || (value.length > installPrefix.length && value[installPrefix.length] !== '/')) {
             return quotedValue;
         }
-        return quotedValue.replace(product.qbs.installPrefix, "${prefix}");
+        return quotedValue.replace(topLevelProduct.qbs.installPrefix, "${prefix}");
     }
 
     function transformedValue(product, moduleName, propertyName)
@@ -92,7 +92,7 @@ function collectAutodetectedData(topLevelProduct)
         var value = transformFunc
                 ? eval("(" + transformFunc + ")(product, moduleName, propertyName, originalValue)")
                 : originalValue;
-        if (Array.isArray(value))
+        if (value instanceof Array)
             value.forEach(function(v, i, a) { a[i] = quoteAndPrefixify(v); });
         else if (value)
             value = quoteAndPrefixify(value);