d -r -d '' file
+++ isELF /nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/libstdc++.a
+++ local fn=/nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/libstdc++.a
+++ local fd
+++ local magic
+++ exec
+++ read -r -n 4 -u 11 magic
+++ exec
+++ [[ !<ar =~ ELF ]]
+++ return 1
+++ continue
+++ IFS=
+++ read -r -d '' file
+++ isELF /nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/redboot-crt0.o
+++ local fn=/nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/redboot-crt0.o
+++ local fd
+++ local magic
+++ exec
+++ read -r -n 4 -u 11 magic
+++ exec
+++ [[ ELF =~ ELF ]]
+++ return 0
+++ isExecutable /nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/redboot-crt0.o
+++ readelf -h /nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/redboot-crt0.o
+++ grep -q '^ *Type: *EXEC\>'
+++ autoPatchelfFile /nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/redboot-crt0.o
+++ local dep rpath= toPatch=/nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/redboot-crt0.o
+++ local interpreter=/nix/store/fg4yq8i8wd08xg3fy58l6q73cjy8hjr2-glibc-2.27/lib/ld-linux-x86-64.so.2
+++ isExecutable /nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/redboot-crt0.o
+++ readelf -h /nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/redboot-crt0.o
+++ grep -q '^ *Type: *EXEC\>'
+++ echo 'searching for dependencies of /nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/redboot-crt0.o'
searching for dependencies of /nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/redboot-crt0.o
+++ patchelf --remove-rpath /nix/store/0bvwvmaz3rd8iz3zc3vyclwid0sfbbhg-gcc-arm-embedded-7-2018-q2-update/arm-none-eabi/lib/redboot-crt0.o
wrong ELF type
+ exitHandler
+ exitCode=1
+ set +e
+ '[' -n '' ']'
+ ((  1 != 0  ))
+ runHook failureHook
++ shopt -po nounset
+ local 'oldOpts=set +o nounset'
+ set -u
+ local hookName=failureHook
+ shift
+ local 'hooksSlice=failureHooks[@]'
+ local hook
+ for hook in "_callImplicitHook 0 $hookName" ${!hooksSlice+"${!hooksSlice}"}
+ _eval '_callImplicitHook 0 failureHook'
++ type -t '_callImplicitHook 0 failureHook'
+ '[' '' = function ']'
+ set +u
+ eval '_callImplicitHook 0 failureHook'
++ _callImplicitHook 0 failureHook
++ set -u
++ local def=0
++ local hookName=failureHook
++ case "$(type -t "$hookName")" in
+++ type -t failureHook
++ '[' -z '' ']'
++ return 0
+ set -u
+ eval 'set +o nounset'
++ set +o nounset
+ return 0
+ '[' -n '' ']'
+ exit 1
builder for '/nix/store/fyy18kcbjlgwqayr9iyykhmbrmsqp598-gcc-arm-embedded-7-2018-q2-update.drv' failed with exit code 1
error: build of '/nix/store/fyy18kcbjlgwqayr9iyykhmbrmsqp598-gcc-arm-embedded-7-2018-q2-update.drv' failed