postfix says i need "db*-devel package" but i already have it!!

[gwu]

i am trying to build postfix-2.0.10 on redhat 9.0. I am getting an error when i "make makefiles". Error:
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src/util]
(set -e; echo "# DO NOT EDIT"; /bin/sh ../../makedefs && cat Makefile.in) >Makefile
No <db.h> include file found.
Install the appropriate db*-devel package first.
See the RELEASE_NOTES file for more information.
make: *** [Makefile] Error 1
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however i have already built db-4.1.25 on my machine and have &quot;db.h&quot; located at &quot;/usr/local/bdb/include&quot;
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here is the command i am using to build postfix:
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make makefiles &quot;CCARGS= -DHAS_MYSQL -I/usr/local/mysql/include/mysql -I /usr/local/bdb/include -DUSE_SASL_AUTH -I/usr/local/include/sasl&quot; &quot;AUXLIBS=-L /usr/local/m/includeysql/lib/mysql -l mysqlclient -lz -lm -L /usr/local/lib -lsasl2 -L /usr/local/bdb/lib&quot;
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thanks in advance