lib/libcom_err/doc - tex: not found

[Andrew Pantyukhin]

I wonder what I'm doing wrong. While compiling
very fresh current on i386:

===> lib/libcom_err/doc (all)
TEXINPUTS=/usr/7/src/lib/libcom_err/doc:/usr/7/src/lib/libcom_err/doc:$TEXINPUTS
 tex /usr/7/src/lib/libcom_err/doc/com_err.texinfo </dev/null
tex: not found
*** Error code 127

Stop in /usr/7/src/lib/libcom_err/doc.
*** Error code 1

I actually have tex installed from tetex-base