Importing a CSV with different row widths into Incanter?

I'm trying to import a CSV file with rows of many different lengths into Incanter using the read-dataset function. Unfortunately, it appears to truncate the rows down to the length of the first row. Short of reordering the dataset, or searching for the largest row and adding a row at the top of that width, is there a way to solve this problem? The documentation doesn't seem to offer any optional parameters to read-dataset.