nvim error when expanding commands from shell

[divramod]

when using nvim with honza/vim-snippets installed, this snippet

snippet io-til "io-til"
	`#!/bin/bash
	echo hello world
	`

causes this error

E5108: Error executing lua ...pack/packer/start/LuaSnip/lua/luasnip/util/functions.lua:39: nvim_exec2(): Vim(echo):E121: Undefined variable: #
stack traceback:
        [C]: in function 'nvim_exec'
        ...pack/packer/start/LuaSnip/lua/luasnip/util/functions.lua:39: in function 'fn'
        ...k/packer/start/LuaSnip/lua/luasnip/nodes/dynamicNode.lua:148: in function 'update'
        .../pack/packer/start/LuaSnip/lua/luasnip/nodes/snippet.lua:849: in function 'update'
        .../pack/packer/start/LuaSnip/lua/luasnip/nodes/snippet.lua:616: in function 'trigger_expand'
        ...nvim/site/pack/packer/start/LuaSnip/lua/luasnip/init.lua:244: in function 'snip_expand'
        ...e/pack/packer/start/cmp_luasnip/lua/cmp_luasnip/init.lua:143: in function 'execute'
        .../nvim/site/pack/packer/start/nvim-cmp/lua/cmp/source.lua:404: in function 'execute'
        ...e/nvim/site/pack/packer/start/nvim-cmp/lua/cmp/entry.lua:485: in function 'execute'
        ...re/nvim/site/pack/packer/start/nvim-cmp/lua/cmp/core.lua:503: in function <...re/nvim/site/pack/packer/start/nvim-cmp/lua/cmp/core.lua:502>
        ...te/pack/packer/start/nvim-cmp/lua/cmp/utils/feedkeys.lua:47: in function <...te/pack/packer/start/nvim-cmp/lua/cmp/utils/feedkeys.lua:45>

is there anybody with an idea?
do i have to set something up in nvim?

[lpil]

Hello! If you're having issues with custom snippets I'm afraid we cannot help. You may want to open an issue with the snippet engine plugin you are using.