Carl Dong writes: > Unfortunately b1593c1c4fd8f4fc6df4c43cab51334426e3aa76 still doesn't work, I've > attached the log. Drat. Plain text log: --8<---------------cut here---------------start------------->8--- Making check in . make[2]: Entering directory '/tmp/guix-build-bison-3.4.1.drv-0/bison-3.4.1' GEN doc/bison.help make examples/c/calc/calc examples/c/lexcalc/lexcalc examples/c/mfcalc/mfcalc examples/c/reccalc/reccalc examples/c/rpcalc/rpcalc examples/c++/calc++/calc++ examples/c++/simple examples/c++/variant examples/c++/variant-11 ./tests/bison tests/atconfig tests/atlocal make[3]: Entering directory '/tmp/guix-build-bison-3.4.1.drv-0/bison-3.4.1' YACC examples/c/calc/calc.c YACC examples/c/lexcalc/parse.c LEX examples/c/lexcalc/scan.c YACC examples/c/mfcalc/mfcalc.c YACC examples/c/reccalc/parse.c YACC examples/c/rpcalc/rpcalc.c YACC examples/c++/calc++/parser.stamp LEX examples/c++/calc++/scanner.cc YACC examples/c++/simple.cc make[3]: 'tests/bison' is up to date. make[3]: Nothing to be done for 'tests/atconfig'. make[3]: 'tests/atlocal' is up to date. YACC examples/c++/variant.cc YACC examples/c++/variant-11.cc CC examples/c/reccalc/reccalc-scan.o CC examples/c/lexcalc/lexcalc-scan.o ./examples/c/reccalc/scan.l:13:10: fatal error: parse.h: No such file or directory #include "parse.h" ^~~~~~~~~ compilation terminated. make[3]: *** [Makefile:4148: examples/c/reccalc/reccalc-scan.o] Error 1 make[3]: *** Waiting for unfinished jobs.... examples/c/lexcalc/scan.l:10:10: fatal error: parse.h: No such file or directory #include "parse.h" ^~~~~~~~~ compilation terminated. make[3]: *** [Makefile:4106: examples/c/lexcalc/lexcalc-scan.o] Error 1 --8<---------------cut here---------------end--------------->8--- Hopefully fixed in 2c35ae82192fd6f1732b15fa41aec87aa61a1879, thanks for reporting it!