diff --git a/src/Makefile.shlib b/src/Makefile.shlib
index 4b2a62fa14c..59779b616f3 100644
--- a/src/Makefile.shlib
+++ b/src/Makefile.shlib
@@ -387,14 +387,19 @@ endif # PORTNAME == cygwin || PORTNAME == win32
 
 
 %.pc: $(MAKEFILE_LIST)
-	echo 'Name: lib$(NAME)' >$@
+	echo 'prefix=$(prefix)' >$@
+	echo 'exec_prefix=$(patsubst $(prefix),$${prefix},$(exec_prefix))' >>$@
+	echo 'libdir=$(patsubst $(exec_prefix)/%,$${exec_prefix}/%,$(libdir))' >>$@
+	echo 'includedir=$(patsubst $(prefix)/%,$${prefix}/%,$(includedir))' >>$@
+	echo >>$@
+	echo 'Name: lib$(NAME)' >>$@
 	echo 'Description: PostgreSQL lib$(NAME) library' >>$@
 	echo 'Url: $(PACKAGE_URL)' >>$@
 	echo 'Version: $(VERSION)' >>$@
 	echo 'Requires: ' >>$@
 	echo 'Requires.private: $(PKG_CONFIG_REQUIRES_PRIVATE)' >>$@
-	echo 'Cflags: -I$(includedir)' >>$@
-	echo 'Libs: -L$(libdir) -l$(NAME)' >>$@
+	echo 'Cflags: -I$${includedir}' >>$@
+	echo 'Libs: -L$${libdir} -l$(NAME)' >>$@
 # Record -L flags that the user might have passed in to the PostgreSQL
 # build to locate third-party libraries (e.g., ldap, ssl).  Filter out
 # those that point inside the build or source tree.  Use sort to