ruby: Make reproducible

Bundled gems that have native extensions have a gem_make.out file that
is the build log for the native extension. That file contains random
filenames. Since this file is not needed, simply remove it.

With this change, ruby_3_1 build is reproducible, at least on
x86_64-linux.

Example `diff -ur` from `nix build --rebuild --keep-failed .#ruby_3_1`,
before this change:

```diff
diff -ur /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/extensions/x86_64-linux/3.1.0/debug-1.4.0/gem_make.out /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2.check/lib/ruby/gems/3.1.0/extensions/x86_64-linux/3.1.0/debug-1.4.0/gem_make.out
--- /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/extensions/x86_64-linux/3.1.0/debug-1.4.0/gem_make.out	1969-12-31 19:00:01.000000000 -0500
+++ /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2.check/lib/ruby/gems/3.1.0/extensions/x86_64-linux/3.1.0/debug-1.4.0/gem_make.out	1969-12-31 19:00:01.000000000 -0500
@@ -3,12 +3,12 @@
 creating Makefile

 current directory: /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/debug-1.4.0/ext/debug
-make DESTDIR\= sitearchdir\=./.gem.20221028-31660-a79mlv sitelibdir\=./.gem.20221028-31660-a79mlv clean
+make DESTDIR\= sitearchdir\=./.gem.20221109-31667-zllvs sitelibdir\=./.gem.20221109-31667-zllvs clean
 make[1]: Entering directory '/nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/debug-1.4.0/ext/debug'
 make[1]: Leaving directory '/nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/debug-1.4.0/ext/debug'

 current directory: /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/debug-1.4.0/ext/debug
-make DESTDIR\= sitearchdir\=./.gem.20221028-31660-a79mlv sitelibdir\=./.gem.20221028-31660-a79mlv
+make DESTDIR\= sitearchdir\=./.gem.20221109-31667-zllvs sitelibdir\=./.gem.20221109-31667-zllvs
 make[1]: Entering directory '/nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/debug-1.4.0/ext/debug'
 compiling debug.c
 compiling iseq_collector.c
@@ -16,7 +16,7 @@
 make[1]: Leaving directory '/nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/debug-1.4.0/ext/debug'

 current directory: /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/debug-1.4.0/ext/debug
-make DESTDIR\= sitearchdir\=./.gem.20221028-31660-a79mlv sitelibdir\=./.gem.20221028-31660-a79mlv install
+make DESTDIR\= sitearchdir\=./.gem.20221109-31667-zllvs sitelibdir\=./.gem.20221109-31667-zllvs install
 make[1]: Entering directory '/nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/debug-1.4.0/ext/debug'
-/nix/store/xq4g38m5ppg78z7bzfxyy2s8ii693k74-coreutils-9.1/bin/install -c -m 0755 debug.so ./.gem.20221028-31660-a79mlv/debug
+/nix/store/xq4g38m5ppg78z7bzfxyy2s8ii693k74-coreutils-9.1/bin/install -c -m 0755 debug.so ./.gem.20221109-31667-zllvs/debug
 make[1]: Leaving directory '/nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/debug-1.4.0/ext/debug'
diff -ur /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/extensions/x86_64-linux/3.1.0/rbs-2.1.0/gem_make.out /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2.check/lib/ruby/gems/3.1.0/extensions/x86_64-linux/3.1.0/rbs-2.1.0/gem_make.out
--- /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/extensions/x86_64-linux/3.1.0/rbs-2.1.0/gem_make.out	1969-12-31 19:00:01.000000000 -0500
+++ /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2.check/lib/ruby/gems/3.1.0/extensions/x86_64-linux/3.1.0/rbs-2.1.0/gem_make.out	1969-12-31 19:00:01.000000000 -0500
@@ -3,12 +3,12 @@
 creating Makefile

 current directory: /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/rbs-2.1.0/ext/rbs_extension
-make DESTDIR\= sitearchdir\=./.gem.20221028-31660-cv0bgw sitelibdir\=./.gem.20221028-31660-cv0bgw clean
+make DESTDIR\= sitearchdir\=./.gem.20221109-31667-7spnp3 sitelibdir\=./.gem.20221109-31667-7spnp3 clean
 make[1]: Entering directory '/nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/rbs-2.1.0/ext/rbs_extension'
 make[1]: Leaving directory '/nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/rbs-2.1.0/ext/rbs_extension'

 current directory: /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/rbs-2.1.0/ext/rbs_extension
-make DESTDIR\= sitearchdir\=./.gem.20221028-31660-cv0bgw sitelibdir\=./.gem.20221028-31660-cv0bgw
+make DESTDIR\= sitearchdir\=./.gem.20221109-31667-7spnp3 sitelibdir\=./.gem.20221109-31667-7spnp3
 make[1]: Entering directory '/nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/rbs-2.1.0/ext/rbs_extension'
 compiling constants.c
 compiling lexer.c
@@ -23,7 +23,7 @@
 make[1]: Leaving directory '/nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/rbs-2.1.0/ext/rbs_extension'

 current directory: /nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/rbs-2.1.0/ext/rbs_extension
-make DESTDIR\= sitearchdir\=./.gem.20221028-31660-cv0bgw sitelibdir\=./.gem.20221028-31660-cv0bgw install
+make DESTDIR\= sitearchdir\=./.gem.20221109-31667-7spnp3 sitelibdir\=./.gem.20221109-31667-7spnp3 install
 make[1]: Entering directory '/nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/rbs-2.1.0/ext/rbs_extension'
-/nix/store/xq4g38m5ppg78z7bzfxyy2s8ii693k74-coreutils-9.1/bin/install -c -m 0755 rbs_extension.so ./.gem.20221028-31660-cv0bgw
+/nix/store/xq4g38m5ppg78z7bzfxyy2s8ii693k74-coreutils-9.1/bin/install -c -m 0755 rbs_extension.so ./.gem.20221109-31667-7spnp3
 make[1]: Leaving directory '/nix/store/m9xczrqsh4chvg4b9z3sl4y93s0jqlbg-ruby-3.1.2/lib/ruby/gems/3.1.0/gems/rbs-2.1.0/ext/rbs_extension'
```

1 files changed, 1 insertions, 0 deletions

diff --git a/pkgs/development/interpreters/ruby/default.nix b/pkgs/development/interpreters/ruby/default.nix
index cd1f1ecd82d04..c7e01ea0f94d8 100644
--- a/pkgs/development/interpreters/ruby/default.nix
+++ b/pkgs/development/interpreters/ruby/default.nix
@@ -192,6 +192,7 @@ let
           for makefile in $extMakefiles; do
             make -C "$(dirname "$makefile")" distclean
           done
+          find "$out/${passthru.gemPath}" -name gem_make.out -delete
           # Bundler tries to create this directory
           mkdir -p $out/nix-support
           cat > $out/nix-support/setup-hook <<EOF