`tools/build/src/engine/execunix.cpp` was named `tools/build/src/engine/execunix.c` before. So the following patch allows to build boost@1.59 again.
``` diff --git a/gnu/packages/boost.scm b/gnu/packages/boost.scm index 2f2ca289ab..d44b534939 100644 --- a/gnu/packages/boost.scm +++ b/gnu/packages/boost.scm @@ -120,10 +120,11 @@ (let ((icu (assoc-ref inputs "icu4c")) (python (assoc-ref inputs "python")) (out (assoc-ref outputs "out"))) - (substitute* '("libs/config/configure" - "libs/spirit/classic/phoenix/test/runtest.sh" - "tools/build/src/engine/execunix.cpp" - "tools/build/src/engine/Jambase") + (substitute* (append + (find-files "tools/build/src/engine/" "execunix\\.c.*") + '("libs/config/configure" + "libs/spirit/classic/phoenix/test/runtest.sh" + "tools/build/src/engine/Jambase")) (("/bin/sh") (which "sh"))) (setenv "SHELL" (which "sh")) ``` Although it fails with ``` libs/python/src/converter/builtin_converters.cpp: In function ‘void* boost::python::converter::{anonymous}::convert_to_cstring(PyObject*)’: libs/python/src/converter/builtin_converters.cpp:51:35: error: invalid conversion from ‘const void*’ to ‘void*’ [-fpermissive] return PyUnicode_Check(obj) ? _PyUnicode_AsString(obj) : 0; "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -pthread -fPIC -m64 -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DNDEBUG -I"." -I"/gnu/store/q9rm8h9imazsq2c4qiv2yjpvlvliywqb-python-3.8.2/include/python3.8" -c -o "bin.v2/libs/python/build/gcc-7.5.0/release/threading-multi/converter/builtin_converters.o" "libs/python/src/converter/builtin_converters.cpp" ```