Amorphous and crystalline solid forms of the anti-HCV compound (1-{3-[6-(9,9-difluoro-7-{2-[5-(2-methoxycarbonylamino-3-methyl-butyryl)-5-aza-spiro[2.4]hept-6-yl]-3H-imidazol-4-yl}-9H-fluoren-2-yl)-1H-benzoimidazol-2-yl]-2-aza-bicyclo[2.2.1]heptane-2-carbonyl}-2-methyl-propyl)-carbamic acid methyl ester (Compound I) were prepared and characterized in the solid state: Also provided are processes of manufacture and methods of using the amorphous and crystalline forms.製備抗-HCV化合物(1-{3-[6-(9,9-二氟-7-{2-[5-(2-甲氧羰胺基-3-甲基-丁醯基)-5-氮雜-螺[2.4]庚-6-基]-3H-咪唑-4-基}-9H-茀-2-基)-1H-苯並咪唑-2-基]-2-氮雜-雙環[2.2.1]庚烷-2-羰基}-2-甲基-丙基)-胺甲酸甲酯(化合物I)之非晶形和晶形固體形式且描述其固態的特徵:也提供該非晶形和晶形形式之製造方法及使用方法。