diff --git a/nodejs-underscore.spec b/nodejs-underscore.spec
index e377e84..fa55ffb 100644
--- a/nodejs-underscore.spec
+++ b/nodejs-underscore.spec
@@ -62,18 +62,17 @@ rm -f underscore-min.*
 
 
 %build
-/usr/bin/uglifyjs underscore.js -m --source-map underscore-min.map \
-    -o underscore-min.js
+/usr/bin/uglifyjs underscore.js -m --source-map -o underscore-min.js
 
 
 %install
 mkdir -p %{buildroot}%{nodejs_sitelib}/underscore
-cp -pr package.json underscore.js underscore-min.js underscore-min.map \
+cp -pr package.json underscore.js underscore-min.js underscore-min.js.map \
     %{buildroot}%{nodejs_sitelib}/underscore
 
 # Install browser version
 mkdir -p %{buildroot}%{installdir}
-cp -pr underscore.js underscore-min.js underscore-min.map \
+cp -pr underscore.js underscore-min.js underscore-min.js.map \
     %{buildroot}%{installdir}
 
 # No dependencies.