Subject: bug#49949: [core-updates]: Blender fails to build

From: Leo Famulari <[email-masked]>
Date: Sun, 8 Aug 2021 21:54:05 -0400

On core-updates-frozen, Blender fails to build like this:

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[ 45%] Building C object source/blender/imbuf/CMakeFiles/bf_imbuf.dir/intern/scaling.c.o
/tmp/guix-build-blender-2.92.0.drv-0/blender-2.92.0/source/blender/imbuf/intern/openexr/openexr_api.cpp:35:10: fatal error: Iex.h: No such file or directory
   35 | #include <Iex.h>
      |          ^~~~~~~
compilation terminated.
make[2]: *** [source/blender/imbuf/intern/openexr/CMakeFiles/bf_imbuf_openexr.dir/build.make:79: source/blender/imbuf/intern/openexr/CMakeFiles/bf_imbuf_openexr.dir/openexr_api.cpp.o] Error 1
make[2]: Leaving directory '/tmp/guix-build-blender-2.92.0.drv-0/build'
make[1]: *** [CMakeFiles/Makefile2:5942: source/blender/imbuf/intern/openexr/CMakeFiles/bf_imbuf_openexr.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
cc1: warning: /usr/include: No such file or directory [-Wmissing-include-dirs]
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Any ideas?