How to fix an error when installing a package in composer?

Question

symfony

I want to install Blade for Symfony so I can use it instead of Twig. Found in this package: https://github.com/duncan3dc/blade
When installing composer gives an error:

Problem 1
- Conclusion: remove symfony/symfony v3.1.2
- duncan3dc/blade 2.2.0 requires illuminate/view ~5.1.0 -> satisfiable by illuminate/view[v5.1.1, v5.1.13, v5.1.16, v5.1.2 , v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41, v5.1.6, v5.1.8
].
- duncan3dc/blade 2.2.1 requires illuminate/view ~5.1.0 -> satisfiable by illuminate/view[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25 , v5.1.28, v5.1.30, v5.1.31, v5.1.41, v5.1.6, v5.1.8
].
- illuminate/view v5.1.1 requires illuminate/filesystem 5.1.* -> satisfiable by illuminate/filesystem[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41,
v5.1.6, v5.1.8].
- illuminate/view v5.1.13 requires illuminate/filesystem 5.1.* -> satisfiable by illuminate/filesystem[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41,
v5.1.6, v5.1.8].
- illuminate/view v5.1.16 requires illuminate/filesystem 5.1.* -> satisfiable by illuminate/filesystem[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41,
v5.1.6, v5.1.8].
- illuminate/view v5.1.2 requires illuminate/filesystem 5.1.* -> satisfiable by illuminate/filesystem[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41,
v5.1.6, v5.1.8].
- illuminate/view v5.1.20 requires illuminate/filesystem 5.1.* -> satisfiable by illuminate/filesystem[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41,
v5.1.6, v5.1.8].
- illuminate/view v5.1.22 requires illuminate/filesystem 5.1.* -> satisfiable by illuminate/filesystem[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41,
v5.1.6, v5.1.8].
- illuminate/view v5.1.25 requires illuminate/filesystem 5.1.* -> satisfiable by illuminate/filesystem[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41,
v5.1.6, v5.1.8].
- illuminate/view v5.1.28 requires illuminate/filesystem 5.1.* -> satisfiable by illuminate/filesystem[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41,
v5.1.6, v5.1.8].
- illuminate/view v5.1.30 requires illuminate/filesystem 5.1.* -> satisfiable by illuminate/filesystem[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41,
v5.1.6, v5.1.8].
- illuminate/view v5.1.31 requires illuminate/filesystem 5.1.* -> satisfiable by illuminate/filesystem[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41,
v5.1.6, v5.1.8].
- illuminate/view v5.1.6 requires illuminate/filesystem 5.1.* -> satisfiable by illuminate/filesystem[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41,
v5.1.6, v5.1.8].
- illuminate/view v5.1.8 requires illuminate/filesystem 5.1.* -> satisfiable by illuminate/filesystem[v5.1.1, v5.1.13, v5.1.16, v5.1.2, v5.1.20, v5.1.22, v5.1.25, v5.1.28, v5.1.30, v5.1.31, v5.1.41,
v5.1.6, v5.1.8].
- illuminate/filesystem v5.1.1 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4,
v2.7.5, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/filesystem v5.1.13 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5
, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/filesystem v5.1.16 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5
, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/filesystem v5.1.2 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4,
v2.7.5, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/filesystem v5.1.20 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5
, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/filesystem v5.1.22 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5
, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/filesystem v5.1.25 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5
, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/filesystem v5.1.28 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5
, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/filesystem v5.1.30 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5
, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/filesystem v5.1.31 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5
, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/filesystem v5.1.41 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5
, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/filesystem v5.1.6 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4,
v2.7.5, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/filesystem v5.1.8 requires symfony/finder 2.7.* -> satisfiable by symfony/finder[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4,
v2.7.5, v2.7.6, v2.7.7, v2.7.8, v2.7.9].
- illuminate/view v5.1.41 requires symfony/debug 2.7.* -> satisfiable by symfony/debug[v2.7.0, v2.7.1, v2.7.10, v2.7.11, v2.7.12, v2.7.13, v2.7.14, v2.7.15, v2.7.16, v2.7.2, v2.7.3, v2.7.4, v2.7.5, v2.7.6,
v2.7.7, v2.7.8, v2.7.9].
- don't install symfony/finder v2.7.0|don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.1|don't install symfony/symfony v3.1.2
- don't install symfony /finder v2.7.10|don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.11|don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.12| don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.13|don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.14|don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.15|don't install symfony/symfony v3.1.2
- don't install symfony /finder v2.7.16|don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.2|don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.3| don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.4|don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.5|don't install symfony/ symfony v3.1.2
- don't install symfony/finder v2.7.6|don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.7|don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.8|don't install symfony/symfony v3.1.2
- don't install symfony/finder v2.7.9|don't install symfony/symfony v3.1.2
- don't install symfony /debug v2.7.0|don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.1|don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.10| don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.11|don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.12|don't install symfony/ symfony v3.1.2
- don't install symfony/debug v2.7.13|don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.14|don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.15|don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.16|don't install symfony/symfony v3.1.2
- don't install symfony /debug v2.7.2|don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.3|don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.4| don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.5|don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.6|don't install symfony/ symfony v3.1.2
- don't install symfony/debug v2.7.7|don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.8|don't install symfony/symfony v3.1.2
- don't install symfony/debug v2.7.9|don't install symfony/symfony v3.1.2
- Installation request for symfony/symfony (installed at v3.1.2, required as 3.1.*) -> satisfiable by symfony/symfony[ v3.1.2].
- Installation request for duncan3dc/blade ^2.2 -> satisfiable by duncan3dc/blade[2.2.0, 2.2.1].

How to solve this problem?

Answer 1

"Unfortunately the latest release of Laravel does not support Symfony 3.1 components.
It looks like they are planning to support them in Laravel 5.3, but until that is released it won't be possible to installed stable versions of Laravel and Symfony 3.1 together"

Answer 2

illuminate/filesystem v5.1.6 requires symfony/finder 2.7.*

that's the whole answer. Dependency version conflict.

Answer 3

He tells you at the very beginning:
Conclusion: remove symfony/symfony v3.1.2