Internal NuGet install fails to install -

i setup internal nuget server host internal dll packages. setup went smoothly. spec , nupkg created successfully. however, when launch test project , attempt install manage nuget packages fails.

the internal package shows under manage nuget packages install button. hit install nothing. check references folder , saw nothing added.

if check manage nuget packages @ solution level, has green check mark indicate it's installed doesn't give me manage option see project installed to.

my issue similar post below. difference don't have sub folders library. have 1 dll , i'm putting nupkg file directly under packages folder. nuget package fails install

i'm not sure did wrong. suggestions?

thanks @mattward mentioned package got installed @ solution level. went official documentation here: https://docs.nuget.org/create/creating-and-publishing-a-package review differences creating solution level package vs project level package , important of nuget naming convention when creating packages (the lib, content, etc. folder). re-package dll again naming convention , works!