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    <div class="moz-cite-prefix">Hi,</div>
    <div class="moz-cite-prefix"><br>
    </div>
    <div class="moz-cite-prefix">please try with the latest commit.</div>
    <div class="moz-cite-prefix"><br>
    </div>
    <div class="moz-cite-prefix">Best,</div>
    <div class="moz-cite-prefix">Tobias<br>
    </div>
    <div class="moz-cite-prefix"><br>
    </div>
    <div class="moz-cite-prefix">On 6/8/20 9:17 PM, John Scott wrote:<br>
    </div>
    <blockquote type="cite" cite="mid:2520538.1uHrz1cCud@t450">
      <pre class="moz-quote-pre" wrap="">Nope, I haven't been able to get it figured out. I've realized that configure 
isn't invoked by debhelper directly but instead by
run_build = \
MAKE='make -j$(NUMJOBS)' PREREQ_OPTIONS="--prefix=$(SAGE_LOCAL) --enable-build-
as-root" $(MAKE) --directory=sage

since it seems PREREQ_OPTIONS gets passed on to configure via Sage's Makefile:
</pre>
      <blockquote type="cite">
        <pre class="moz-quote-pre" wrap=""># If configure was run before, rerun it with the old arguments.
# Otherwise, run configure with argument $PREREQ_OPTIONS.
build/make/Makefile: configure build/make/deps $(SPKG_COLLECT_FILES)
$(CONFIG_FILES:%=%.in) rm -f config.log
mkdir -p logs/pkgs
ln -s logs/pkgs/config.log config.log
@if [ -x config.status ]; then \
./config.status --recheck && ./config.status; \
else \
./configure $$PREREQ_OPTIONS; \
fi
</pre>
      </blockquote>
      <pre class="moz-quote-pre" wrap="">
This doesn't help the error though and it also blocks building in sbuild. I 
don't know why the variable doesn't get passed on. Varying combinations of 
switching $$ for $(...) and $, and moving variables before and after the 
invocation of Make didn't appear to help.</pre>
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
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