Index: configure.ac
===================================================================
diff -u -N -r6a7797080da8aa149dd433f3ab992e2a08a66e4c -rcd18d47f5e3a972323f00af2cb6a42c9dc9d1a54
--- configure.ac	(.../configure.ac)	(revision 6a7797080da8aa149dd433f3ab992e2a08a66e4c)
+++ configure.ac	(.../configure.ac)	(revision cd18d47f5e3a972323f00af2cb6a42c9dc9d1a54)
@@ -113,7 +113,7 @@
 elif test -f "COMMIT" ; then
    nsf_commit=`cat COMMIT`
 else
-   nsf_commit=`unknown-$PACKAGE_VERSION`
+   nsf_commit=unknown-${PACKAGE_VERSION}
 fi
 
 NSF_COMMIT=$nsf_commit