diff -u ghc6-6.10.1+dfsg1/debian/rules ghc6-6.10.1+dfsg1/debian/rules
--- ghc6-6.10.1+dfsg1/debian/rules
+++ ghc6-6.10.1+dfsg1/debian/rules
@@ -130,7 +130,7 @@
 	# Sort out the package.conf files
 	mv debian/tmp/usr/lib/ghc-$(ProjectVersion)/package.conf \
 	   debian/tmp/usr/lib/ghc-$(ProjectVersion)/package.conf.shipped
-	PACKAGE=`utils/ghc-pkg/ghc-pkg-inplace list -f debian/tmp/usr/lib/ghc-$(ProjectVersion)/package.conf.shipped | perl -ne 'print if $$foo; $$foo = 1 if /^debian/' | tr '\n,A-Z' '  a-z' | sed -e "s/([^)]*)//g" -e "s/-[0-9]\+\(\.[0-9]\+\)*//g" -e "s/^ *//" -e "s/ *$$//" -e "s/  */, /g"`; \
+	PACKAGE=`utils/ghc-pkg/install-inplace/bin/ghc-pkg list -f debian/tmp/usr/lib/ghc-$(ProjectVersion)/package.conf.shipped | perl -ne 'print if $$foo; $$foo = 1 if /^debian/' | tr '\n,A-Z' '  a-z' | sed -e "s/([^)]*)//g" -e "s/-[0-9]\+\(\.[0-9]\+\)*//g" -e "s/^ *//" -e "s/ *$$//" -e "s/  */, /g"`; \
 	    { echo -n "provided-devs="; \
 	      echo "$$PACKAGE" | sed -e "s/\([a-z0-9.-]\+\)/libghc6-\1-dev/g"; } \
 	          >> debian/ghc6.substvars; \