There is already a "fish" shell.
diff -ur bsd-games-2.17.orig/fish/Makefrag bsd-games-2.17/fish/Makefrag
--- bsd-games-2.17.orig/fish/Makefrag	1970-01-01 07:00:01.000000000 +0700
+++ bsd-games-2.17/fish/Makefrag	2020-08-06 19:18:43.204492847 +0700
@@ -31,7 +31,7 @@
 fish_all:	fish/fish fish/fish.instr fish/fish.6

 fish_install:	fish_all
-	$(INSTALL_BINARY) fish/fish $(INSTALL_PREFIX)$(GAMESDIR)/fish
+	$(INSTALL_BINARY) fish/fish $(INSTALL_PREFIX)$(GAMESDIR)/fish-game
	$(HIDE_GAME) fish
	$(INSTALL_DATA) fish/fish.instr $(INSTALL_PREFIX)$(FISH_INSTRFILE)
	$(INSTALL_MANUAL) fish/fish.6
dden' name='id' value='a5df69fe1e8a63441e8e28af718b474d776b8b6f'/><select name='h' onchange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
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<tr><td><span title='2024-12-12 23:23:33 +0100'>2024-12-12</span></td><td><a href='/guix/commit/etc/manifests/hurd.scm?id=12d00767f036029f1f5738de644d4972db374f4f'>etc: Move manifests to a separate directory.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/disarchive-manifest.scm, etc/hurd-manifest.scm,
etc/kernels-manifest.scm, etc/release-manifest.scm,
etc/source-manifest.scm, etc/system-tests.scm,
etc/time-travel-manifest.scm, etc/upgrade-manifest.scm: Move to…
* etc/manifests: … here, and drop “-manifest” from file name.
* Makefile.am (EXTRA_DIST, assert-binaries-available, check-system):
Adjust accordingly.

Change-Id: Iedee3d0cdd42e72ef8bbf654ea5d3b47dca95874
</span></span></td><td>Ludovic Courtès</td></tr>