= Build Singularity Containers from Recipes =
* Because you do not have administrative privileges, you cannot build a Singularity container from a Singularity recipe file on Cypress.
== Build Remotely on the Cloud ==
* You can build a Singularity container from a recipe on [https://cloud.sylabs.io/builder Sylabs Cloud].
* Then download the resulting .sif file to Cypress from the cloud with the bash command '''wget'''. (See '''man wget'''.)
== Build on Your Local Machine ==
* You could build a Linux machine and install Singularity.
* On Windows 11 or Windows 10 version 2004 and higher (Build 19041 and higher)
 * Install Windows Subsystem for Linux, version 2 ('''WSL 2'''). See [https://learn.microsoft.com/en-us/windows/wsl/install Install WSL].
 * Install Singularity. See [https://sylabs.io/docs/ SingularityCE Documentation].
* As an alternative to SingularityCE, on your local machine (Linux or WSL 2) you could install Apptainer.
 * Apptainer will build '''.sif''' files compatible with Singularity. See [[https://apptainer.org/docs/user/latest/singularity_compatibility.html#sif-image-compatibility | SIF Image Compatibility]].
 * See [[https://apptainer.org/documentation/ | Apptainer Documentation ]].
* Then upload the resulting '''.sif''' file to Cypress from your local machine using scp. (See [[cypress/FileTransfer#scpcommand | scp command]].)