applying the pvclust R function to a precomputed dist object

Question

I'm using R to perform an hierarchical clustering. As a first approach I used hclust and performed the following steps:

1. I imported the distance matrix
2. I used the as.dist function to transform it in a dist object
3. I run hclust on the dist object

Here's the R code:

distm <- read.csv("distMatrix.csv")
d <- as.dist(distm)
hclust(d, "ward")

At this point I would like to do something similar with the function pvclust; however, I cannot because it's not possible to pass a precomputed dist object. How can I proceed considering that I'm using a distance not available among those provided by the dist function of R?