title: Dependency package "package_name" not available
body: <p>I'm getting a strange error when trying to build and reload in RStudio. In my description file I've included a package that I have built and maintain within my organization. It's not on CRAN. Essentially, when I update the DESCRIPTION file (Depends: ...), I get this error: </p>
  
  <pre><code>==&gt; devtools::document(roclets=c('rd', 'collate', 'namespace', 'vignette'))
  
  Updating fczstudy documentation
  Loading fczstudy
  Error in (function (dep_name, dep_ver = NA, dep_compare = NA)  : 
    Dependency package surv3 not available.
  Calls: suppressPackageStartupMessages ... &lt;Anonymous&gt; -&gt; load_all -&gt; load_depends -&gt; mapply -&gt; &lt;Anonymous&gt;
  Execution halted
  </code></pre>
  
  <p>In this case, <code>surv3</code> is a package that I maintain within my organization - I can confirm that it is indeed installed because I'm using it. </p>
  
  <p>This doesn't seem to happen with other packages from CRAN. It just started a few days ago. It's not allowing me to import my package (surv3) </p>
  
  <p>I'm really not sure how to debug this. </p>
  
  <p><code>traceback()</code> in the console after ctrl+shift+B returns nothing</p>
  
  <p>Here is my <code>sessionInfo()</code>:</p>
  
  <pre><code>R version 3.2.0 (2015-04-16)
  Platform: x86_64-w64-mingw32/x64 (64-bit)
  Running under: Windows 8 x64 (build 9200)
  
  locale:
  [1] LC_COLLATE=English_United States.1252 
  [2] LC_CTYPE=English_United States.1252   
  [3] LC_MONETARY=English_United States.1252
  [4] LC_NUMERIC=C                          
  [5] LC_TIME=English_United States.1252    
  
  attached base packages:
  [1] stats     graphics  grDevices utils     datasets  methods  
  [7] base     
  
  other attached packages:
  [1] surv3_1.01     knitr_1.11     fczstudy_0.1.0 dplyr_0.4.3   
  [5] ggplot2_1.0.1 
  
  loaded via a namespace (and not attached):
   [1] Rcpp_0.12.1      assertthat_0.1   digest_0.6.8    
   [4] MASS_7.3-40      R6_2.1.1         grid_3.2.0      
   [7] plyr_1.8.3       gtable_0.1.2     DBI_0.3.1       
  [10] magrittr_1.5     scales_0.3.0     stringi_0.5-5   
  [13] lazyeval_0.1.10  reshape2_1.4.1   rmarkdown_0.8.1 
  [16] proto_0.3-10     tools_3.2.0      stringr_1.0.0   
  [19] munsell_0.4.2    yaml_2.1.13      parallel_3.2.0  
  [22] colorspace_1.2-6 htmltools_0.2.6 
  </code></pre>