failed Building production JavaScript and CSS bundles

I didn’t know where else to turn to, searched everything I could but I’m stuck. During gatsby build or npm run build I get this Unknown word error. I’m using SCSS files and I can’t help but wonder if that is the culprit since it points to a problem with styles.css. I’ve removed node modules, removed cache, restarted everything. Develop works perfectly, but build breaks and cannot complete.

plugins has gatsby-plugin-sass, no options being used. I have node-sass. Where should I look?

D:\MAMP\htdocs\project (master -> origin)                                   
λ npx gatsby build                                                                 
success open and validate gatsby-configs - 0.021s                                  
success load plugins - 0.657s                                                      
success onPreInit - 0.002s                                                         
success delete html and css files from previous builds - 0.012s                    
success initialize cache - 0.005s                                                  
success copy gatsby files - 0.047s                                                 
success onPreBootstrap - 0.007s                                                    
success createSchemaCustomization - 0.004s                                         
success source and transform nodes - 0.276s                                        
success building schema - 0.201s                                                   
success createPages - 1.740s                                                       
success createPagesStatefully - 0.038s                                             
success onPreExtractQueries - 0.001s                                               
success update schema - 0.018s                                                     
success extract queries from components - 0.259s                                   
success write out requires - 0.004s                                                
success write out redirect data - 0.001s                                           
success onPostBootstrap - 0.001s                                                   
⠀                                                                                  
info bootstrap finished - 5.059 s                                                  
⠀                                                                                  
failed Building production JavaScript and CSS bundles - 4.994s                     
                                                                                   
 ERROR #98123  WEBPACK                                                             
                                                                                   
Generating JavaScript bundles failed                                               
                                                                                   
D:\MAMP\htdocs\project \styles.48f74db053b2eb5ceb4c.css:382:5: Unknown word  
                                                                                   
not finished run queries - 5.947s 

[crazydev901]

@xBLADEx how did you solve the issue? I’m getting a similar error when I tried gatsby build

[mfanuzzi]

for those who may run into this in the future; in our case it was due to a bug within cssnano, that has just recently been patched:

https://github.com/gatsbyjs/gatsby/issues/31589