crtmpserver version 0.0~dfsg+svn474-1 failed to build in oneiric

crtmpserver version 0.0~dfsg+svn474-1 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2690848

Details about the rebuild:
http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-20110816-oneiric.html

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2690848/+files/buildlog_ubuntu-oneiric-amd64.crtmpserver_0.0%7Edfsg%2Bsvn474-1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 315 lines into the build log:

-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Looking for openssl headers - found
CMake Error at cmake_find_modules/Find_openssl.cmake:54 (MESSAGE):
  Looking for openssl library - not found
Call Stack (most recent call first):
  CMakeLists.txt:46 (INCLUDE)

-- Configuring incomplete, errors occurred!
dh_auto_configure: cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_VERBOSE_MAKEFILE=ON -DCRTMPSERVER_INSTALL_PREFIX=/usr -DTEMP_FRAMEWORK_VER=0.0_dfsg+svn474 -DCRTMPSERVER_SOURCES_ROOT=/build/buildd/crtmpserver-0.0~dfsg+svn474 returned exit code 1
make[1]: *** [override_dh_auto_configure] Error 2
make[1]: Leaving directory `/build/buildd/crtmpserver-0.0~dfsg+svn474'
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110820-0241
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/crtmpserver-0.0~dfsg+svn474